• Title/Summary/Keyword: 점적관수

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Discharge Variation of Perforated Hoses and Drip Irrigation Systems for Protected Cultivation (시설재배용 분수호스 및 점적관수 시스템의 관수균일도 분석)

  • Nam, Sang-Woon;Kim, Young-Shik
    • Journal of Bio-Environment Control
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    • v.16 no.4
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    • pp.297-302
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    • 2007
  • Discharge variations of perforated hose and drip irrigation systems were examined to evaluate irrigation uniformity at different pressures and length of branch line. Evaluation using statistical uniformity indicated that button drippers performed at excellent level but drip tapes and drip hoses were a little lower level. Nominal discharge of drip irrigation systems showed at the high side within the range of regulating pressure provided by the manufacturer. It is desirable that the length of branch line for drip hose, drip tape, and button dripper should be limited to 50 m, 70 m, and 100 m, respectively. Irrigation uniformity of perforated hoses showed very low level. So it is recommended that the length of branch line for perforated hoses should be limited to $30{\sim}35m$.

The Effects of Trickle Irrigation Culture and Catch in the Rain on Seed Production of Onion (비가림과 점적 관수재배가 양파의 채종량에 미치는 영향)

  • 권병선
    • Korean Journal of Plant Resources
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    • v.9 no.3
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    • pp.249-253
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    • 1996
  • The study was conducted to investigate the effect of the culture with trickle with trickle irrigation in transparent vinyl house on the seed productivity of onion. Growth, number o tiller and leavers, plant height, leaf sheath length, flowering rate, diameter of flower wheel, number of little flower per flower stalk and fertilization rate are best in the case of the seed production under the culture with trickle irrigation in transparent vinyl mulching house, catch in the rain with vinyl from February to March, so it is found that it is appropriate to plant the onion mother bulb under the culture with trickle irrigation in transparent vinyl mulching house, catch in the rain with vinyl from February to March in the Southern areas of Korea.

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Effects of Soil Moisture Content according to Irrigation Methods in Culture on Storability of Cucumber(Cucumis sativus L.) Fruit (관수방법에 따른 토양내 수분함량의 차이가 수확후 오이의 저장에 미치는 영향)

  • 박권우;강호민;장매희;권영삼
    • Journal of Bio-Environment Control
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    • v.4 no.1
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    • pp.74-79
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    • 1995
  • This study was made to investigate the effects of soil moisture content according to irrigation methods on the storability and quality of cucumber. The fresh weight loss of cucumber fruit harvested in drip irrigation plot was more than that in conventional irrigation plot at both 13$^{\circ}C$ and 24$^{\circ}C$ storage temperature. Dry weight ratio decreased during storage, and was higher in conventional irrigation plot than drip irrigation plot both 13$^{\circ}C$ and 241 storage. The decrease of dry weight ratio was higher at 24$^{\circ}C$ than 13$^{\circ}C$. Vitamin C was not influenced by soil moisture content, but decreased during storage at 13$^{\circ}C$ and 24$^{\circ}C$ The decrease of vitamin C at 24$^{\circ}C$ in 8 days after storage was twice as much at 13$^{\circ}C$. Firmness was measured differently in two parts of cucumber ; fruit stalk and blossom part. The firmness of fruit stalk part was higher than that of blossom part. This phenomena was observed continuously at until final day at 13$^{\circ}C$ and 24$^{\circ}C$ storage. But the difference of firmness was not showed in soil moisture content. Vitamin C, firmness and other quality characteristics were not influenced by soil moisture content during cultivation. The different soil moisture content according to irrigation methods did not affect the storability and quality of cucumber.

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Influence of Grass Cover on Water Use and Shoot Growth of Young 'Fuji'/M.26 Apple Trees at Three Soil Water Regimes in Double Pot Lysimeters (토양수분영역을 달리한 double pot-lysimeter에서 자라는 '후지'/M.26 사과나무의 수분이용과 신초 생장에 미치는 잔디피복의 영향)

  • Ro, Hee-Myong
    • Korean Journal of Soil Science and Fertilizer
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    • v.32 no.4
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    • pp.357-364
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    • 1999
  • This study measures the influence of grass cover on water use and shoot growth of apple trees growing under different soil water regimes in temperate climate conditions and evaluates monthly crop coefficients of such conditions during four months of the growing season in 1995. To do so, double pot lysimeter experiments of 3-year-old Fuji' apple (Males domestica Borkh.) trees under a transparent rain shield were designed and installed. Trees were triplicate under three soil water regimes: (A) drip-irrigation at -50 kPa of soil matric potential (IR50). (B) drip-irrigation at -80 kPa of soil matric potential (IR80), and (C) constant shallow water table at 0.45 m below the soil surface (WT45). In each treatment, two soil surface conditions were tested: the soil surface bare, and covered with turf grasses. Mean monthly water use increased with increasing soil matric potential for drip irrigation and was greatest in the WT45 treatment. Monthly crop coefficients increased linearly in time for drip-irrigated apple trees ($r^2$ values of $0.953^{***}$ for turf grass-covered system and of $0.862^{***}$ for bare surface system), while those obtained in the WT45 treatment fluctuated, Duncan's multiple range tests for shoot growth showed that grass-covered IR50 was most favorable to apple trees. while bare surface waterlogged situation was most adverse at least in part due to a lack of oxygen in the root zone. Mid-season leaf Kjeldahl-N was higher in drip-irrigated apple trees than in WT45 trees, while soil Kjeldahl-N was not different irrespective of treatments.

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Survey of Rhizome Rot Incidence of Ginger in Major Production Areas in Korea (생강 주산지에서 뿌리썩음병 발생 실태)

  • 김충회;한기돈;박경석
    • Korean Journal Plant Pathology
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    • v.12 no.3
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    • pp.336-344
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    • 1996
  • 생강뿌리썩음병은 충남 서산, 태안지역이 전북지역보다 3배나 심하게 발생하여 평균 발병주율이 18.1%에 달하였다. 이 병은 서산, 태안지역에서 7월 초순부터 발생하기 시작하여 한여름철의 기온이 높고 비가 많이 오는 장마가 7,8월에 급격히 증가하였으며 기온이 서늘해지기 시작하는 9월 중순까지 진전하였다. 서산, 태안지역과 완주지역은 토양의 이화학적성상 및 미생물상에 큰 차이를 보였으며 완주지역 토성은 서산, 태안에 비해 모래성분이 많고 pH가 낮으며, 유기물, 인산, 치환성 양이온의 함량도 낮았다. 진균, 세균, Pythium spp., Bacillus spp.의 토양내 밀도는 원주지역에서 낮았으나 B/F치는 서산, 태안지역보다 높았다. 완주지역에서 발병이 낮았던 것은 이 지역의 생강이 주로 답전윤환의 작부형태로 논에서 재배되기 때문으로 생각된다. 뿌리썩음병의 발병정도와 재배토양의 이화학적성상과의 상관은 관찰되지 않았다. 이 밖에도 초년재배, 답전윤환, 비가림 재배, 지하점적관수, 사양토 토양, 배수가 양호한 포장, 산간경사지 포장, 종강소독 등은 뿌리썩음병의 발병을 적게 하는 요인들이었다.

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Effect of Tyvex Mulching and Trickle Irrigation on Fruit Quality in Satsuma Mandarin (Citrus unshiu Mark.) (온주밀감의 과실 품질에 미치는 타이벡 멀칭 및 점적관수의 효과)

  • Han, Sang-Heon;Kang, Hoon;Chae, Chi-Won
    • Horticultural Science & Technology
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    • v.32 no.1
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    • pp.18-25
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    • 2014
  • This study was conducted to investigated effects of water relation of mulching and trickle irrigation on the external and internal fruit quality in Satsuma mandarin grafted on trifoliate orange rootstock in a orchard assigned to randomly three groups; whole period of Tyvex mulching (TM), Tyvex mulching with trickle irrigation once a week from October 22 to harvesting season (WM) and non-mulching treatment (NM). The average soil moisture content in the TM was lower than the WM during the time of trickle irrigation from Oct. 21 to Nov. 28. The leaf water potential was at the level of ${\Psi}max$ of -1.5 to -2.5 MPa during whole period of Tyvex mulching treatment but gradually increased at the point of supplement of water. The water and osmotic potential in juice vesicle was decreased by drought but increased again in response to the supply of water in WM. The total soluble solids (TSS) in fruit juice was increased by drought stress, but diminished in response to supply of water after drought. The content of titratible acidity was increased by drought stress but gradually decreased due to supplement of water after drought, reached it at the level of 1%. It was suggested that the accumulation of the total soluble solids compensates the degree of active osmoregulation and the decrease in content of acidity accounts for the fast respiration and water uptake resulted of the water after drought.

Effect of Sub-soil Drip Irrigation and Fertigation on Mulberry Yield (뽕밭 지하점적관수 및 관비에 의한 생산성 향상에 관한 연구)

  • 이원주;최영철;송성범;성문현
    • Journal of Sericultural and Entomological Science
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    • v.34 no.2
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    • pp.6-12
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    • 1992
  • To study the effects of irrigation on the mulberry, 3 experiments were conducted. In experiment 1, four treatments, conventional (no irregation), drip irrigation, fertigation and fertigation with 20% extra fertilizer were examined. Irrigation hose was hurried at 20cm depth under the surface (Experiment 1). Water potential was controled at 0.1, 0.2, 0.5 and 1.0 bar to understand the optimum irrigation potential under rain-block system with plastic film hose(experiment 2). Five leading mulberry varieties, Cheongilppong, Youngcheonppong, Suseongppong, Kaeryangppong and Shinilppong were examined for irrigation response(experiment 3). Fertigation and fertigation with extra fefilizer increased yield by 22%, repectively compared with conventional. Irrigation increased by 8%, but with no significance statistically compared with the conventional. Irrigation, especially fertigation increased water content, P$_2$O$_{5}$, $K_2$O and CaO in leaves, suggested improving leaf quality in fall. Fertigation increased available P$_2$O$_{5}$ content in the sub-soil. More root distribution showed at the sub-soil in fertigation. Weed did not occured in fertigation due to sub-soil fertilization, whereas the conventional received surface fertilization showed 931kg/10 a weed in fresh weight. No effect showed at the 20% extra fertilizer than the conventional amount Maximun yield showed at the 0.5 bar water potential. Irrigation increased yield by 22-25% with Cheongilppong and Yongcheonppong, and by 9-13% with Suseongppong, Shinilppong and Kaeryangppong.

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Effect of Subsurface Drip Pipes Spacing on the Yield of Lettuce, Irrigation Efficiency, and Soil Chemical Properties in Greenhouse Cultivation (지중 점적관수 호스 설치 간격이 상추 수량, 관수량 및 토양 화학성에 미치는 영향)

  • Park, Jin Myeon;Lim, Tae Jun;Lee, Seong Eun
    • Korean Journal of Soil Science and Fertilizer
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    • v.45 no.5
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    • pp.683-689
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    • 2012
  • This research was carried out to investigate the effect of installation spacing of subsurface drip irrigation pipe on the mineral content, nutrient uptake, yield of lettuce, water requirement for irrigation, and soil chemical properties in greenhouse cultivation. Semi-forcing and retarding culture were implemented in this experiment, with four treatments containing overhead spray irrigation and three subsurface irrigation lateral spacing intervals of 30, 40, 50 cm at a depth of 30 cm from soil surface, respectively. Each mineral content of lettuce grown under subirrigation system did not show significant difference between treatments, however the uptake of nutrients was lower at 50 cm-distance. The yield was largest in 30 cm-subirrigation (SI), followed by 40 cm-SI, overhead spray, and 50 cm-treatment. Water requirement for irrigation was highest in overhead spray, and it was in reverse proportion to the distance of irrigation pipes. $NO_3$-N content in the soil, at a depth of 10 cm, showed a higher value in 50 cm-SI, followed by 40 cm-SI, overhead spray and 30 cm-SI. Exchangeable K content was highest in 50 cm-SI, Mg was highest in 40 cm-SI, and Ca was lowest in 30 cm-SI. In conclusion, the lettuce yield was not different between 30 and 40 cm-SI, but water requirement for irrigation was lower as the distance of irrigation pipes was further. And it seems to be needed more precise research on this theme, because crop yield and the dynamics of soil minerals in subsurface irrigation can vary with the depth and distance of irrigation pipes, dripper, water flow depending on the soil texture, and plant response to soil minerals.

Management of Dripper Position in Tomato Perlite Bag Culture (토마토 펄라이트 자루재배에서의 점적핀 위치 관리)

  • Sim, Sang-Youn;Kim, Young-Shik
    • Journal of Bio-Environment Control
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    • v.18 no.4
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    • pp.413-419
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    • 2009
  • The appropriate dripper position in perlite bag was investigated for tomato production. Drippers were laid at 5(F5), 15cm (F15) away from the stem base or 5cm at first and then moved to 15cm later (M5-15). Roots were developed more near the stem base in F5, while less in F15. Roots were distributed evenly in M5-15. In vertical distribution of water in perlite bag, water content was higher as it went deeper with the variation by dripper positions. Yield was high in F15 and low in F5. In conclusion the position of dripper is the best at 15cm from the stem base in perlite bag culture in view of root distribution and yield.

Effect of PE Film Mulching and Irrigation Method on the Growth, Yield and Antioxidant Activity for Potatoes Grown in Winter Season at Saemangeum Reclaimed Land (새만금 간척지에서 감자 겨울재배시 비닐멀칭 및 관수방법이 생육, 수량 및 괴경의 항산화 활성에 미치는 영향)

  • Choi, Weon-Young;Cho, Kwang-Min;Kim, Sun;Jeong, Jae-Hyeok;Lee, Su-Hwan;Lee, Kyeong-Bo;Lee, Geon-Hwi;Park, Ki-Hun
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.60 no.1
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    • pp.63-69
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    • 2015
  • This study was conducted to measure the effect of PE film mulching and irrigation methods on the growth, yield and antioxidant activity of potatoes tubers, in order to examine the possibility of cultivating potatoes in winter season in vinyl greenhouse on the reclaimed tidal land with weak ground inside the sea wall currently completed. The test was conducted on the sandy loam soil (Munpo series), and its salt concentration was 0.42% at the time of planting. The emergence speed per kind of PE film mulching was in the order of black > coloration > transparent > green color, with the black color showing the fastest speed. The temperature change during a day per kind of PE film mulching was in the order of transparent > coloration > green > black color. As for the salt concentration in the soil for each different way of water management, the salt concentration in the treatment of drip irrigation with 1 week interval was lower than that drip irrigation with 2 weeks interval. As for the growth of above-aerial part, plant length was higher, number of tiller and leaves were more and dry weight of above-aerial part was larger in the treatment of drip irrigaton with 1 week interval than drip irrigation with 2 weeks interval. As for the yield of potatoes depending on each way of water management, the yield in the treatment of drip irrigation with 1 week interval was more than drip irrigation with 2 weeks interval. The yield for each different kind of PE film mulching in the weekly drip-irrigation management section was in the order of transparent ${\geq}$ black ${\geq}$ coloration ${\geq}$ green color. In both of total phenol content and DPPH free radical activity experiments, the content and activity were higher with pear color vinyl treatment.