• 한국초지조사료학회지
• /
• 제33권3호
• /
• pp.185-192
• /
• 2013

This study was carried out to investigate the influence of the seeding dates on the yield and feed value in cultivating Italian rye grass on paddy soil. The field experiment was designed in a randomized block design of 3 repetitions with seeding dates of Oct. 19 (T1), Oct. 26 (T2), Nov. 2 (T3), Nov. 9 (T4), and Nov. 16 (T5) treatments. Plant length, fresh yield, dry matter yield and TDN yield were increased with early seeding dates (p<0.05). Crude protein, Crude fat and crude ash were increased with early seeding dates (p<0.05). On the other hand, NDF, ADF and Crude fiber were decreased with early seeding dates (p<0.05). Total mineral contents were higher in the order of T4 > T3 > T5 > T1 > T2 (p<0.05). The total composition amino acid content was decreased significantly (p<0.05) as the seeding dates delayed. Total free sugar content was highest in T1, whereas the lowest in T5 treatment (p<0.05). Nutrition yields (crude protein, crude fat, amino acid and free sugar) were increased significantly with early seeding dates (p<0.05). The above result indicated that it is favorable to seed soon after rice harvest to increase dry matter yield and nutrition yield of Italian ryegrass in the midlands.

• 한국자원식물학회지
• /
• 제25권6호
• /
• pp.700-706
• /
• 2012

Influences of different seeding dates on growth, seed yield, fatty acid composition and oil content were investigated in flax plants for two years. The results indicated that plant height in early seeding date was higher than that of delayed seeding dates during first season. Furthermore, seeding date also significantly affected the ripened seed rate and the rate increased with the delay in seeding date in first season. Seed yield in the first crop season was significantly higher than the second crop season. Palmitic acid showed variation in different seeding dates. Contrarily, stearic acid was stable and did not changed by different seeding dates. Linolenic acid was found in highest amount in all seeding dates consecutively in two cropping years. Highest oil content was recovered from the seeds of flax sown at 29 Apr. and May 9 in first and second cropping year respectively.

• Journal of Animal Science and Technology
• /
• 제61권5호
• /
• pp.278-284
• /
• 2019

This study was carried out to investigate the effects of seeding dates on the yield and feed value of whole-crop barley cultivated in paddy soil. The field experiment was conceived as a randomized block design performed in triplicate with seeding dates of Oct. 19 (T1 as treatment 1), Oct. 26 (T2 as treatment 2), Nov. 2 (T3 as treatment 3), Nov. 9 (T4 as treatment 4), and Nov. 16 (T5 as treatment 5) as treatments. The barley grown in all treatments was harvested on May 21 of the following year. Plant length, fresh yield, dry matter yield, and total digestible nutrient (TDN) yield were higher (p < 0.05) in barley with early seeding dates, whereas crude protein and ether extract were higher (p < 0.05) with late seeding dates. Crude fiber and neutral detergent fiber were highest in the T3 treatment and lowest in the T1 treatment. There was no significant difference between acid detergent fiber and TDN among the different seeding dates. Total mineral contents were higher in the order T1 > T2 > T3 > T4 > T5 (p < 0.05), whereas the total amino acid content increased significantly (p < 0.05) with a delay in seeding date. Free sugar contents (fructose, glucose, and sucrose) were higher with early seeding dates (p < 0.05). Collectively, the results obtained in this study indicate that it is favorable to seed soon after harvesting rice to increase dry matter and TDN yields and mineral and free sugar contents of whole-crop barley in the midlands of Korea.

• 한국초지조사료학회지
• /
• 제14권2호
• /
• pp.125-131
• /
• 1994

This experiment was canied out to study -the effects of different seeding date on the yields and nutritional value of Pearl millet. Seeding dates were $S_1$,$S_2$,$S_3$,$S_4$, and $S_5$, and harvest dates were $S_1$, (7 July) and $S_2$, (18Augst), respectively. The results were summarized as follows: 1. Plant length was not influenced by seeding date at each harvest. The seeding date at $S_4$,showed the longest plant length of 90.4 an on average per year, which was longer by 17 cm compared to 73.3 cm harvested at $S_5$. 2. Total dry matter yield was not significantly different among seeding dates. Total dry matter yield in 1993 increased according to delayed seeding date from $S_1$ to $S_4$. Dry matter yield of 17.3 tonha was obtained in $S_4$. 3. The relative yield of leaf tended to increase with delayed seeding date, and varied from 60% to 69%. 4. Dry matter ratio decreased with delayed seeding date from $S_1$,(20 April) to $S_5$ (30 May), and varied from 15.6% to 12.3%. 5. Crude protein content of leaf at 1st and 2nd harvest and stem at 1st harvest were significantly different among various seeding dates. Avenge crude protein content increased with delayed seeding date from 9.0% at $S_1$ (20April) to 12.8% at (30 May) $S_5$ (30 May). 6. NDF and ADF of leaf at the 1st harvested were significantly different among seeding dates. NDF content decreased with delayed seeding date from 61.9% to 57.8%, and ADF content decreased with delayed seeding date from 34.8% to 32.2%.

• 한국초지조사료학회지
• /
• 제34권2호
• /
• pp.81-86
• /
• 2014

본 시험은 2012년부터 2013년까지 경북 성주에서 사일리지용 옥수수 후작 수단그라스간 교잡종 및 귀리의 파종기가 생육특성, 품질 및 수량성에 미치는 영향을 알기 위해서 실시하였다. 시험설계로 수단그라스는 파종기를 처리로 한 5처리 3반복 귀리는 파종기를 처리로 한 3처리 3반복으로 배치하였다. 수단그라스의 파종기는 2012년과 2013년에 7월 31일부터 9월 10일까지 10일 간격으로, 귀리는 2013년 8월 20일부터 9월 10일까지 10일 간격으로 조파하였다. 수확은 2012년 10월 26일과 2013년 11월 2일에 하였다. 수단그라스의 출수는 3차 파종기까지만 되었고 귀리는 2차 파종기의 것만 출수 되었다. 초장과 건물함량은 파종기가 지연됨에 따라 감소되었다. 수단그라스의 DM 및 DDM 수량은 1차 파종기의 것이 다른 4파종기의 것보다 높았으며(P<0.05) 파종기 간에는 파종기가 지연됨에 따라 감소되었다(P<0.05). 귀리의 DM 및 DDM 수량은 1차 및 2차 파종기 간에는 차이가 없었으나 3차 파종기의 것이 낮았다(P<0.05). 수단그라스와 귀리의 CP 함량은 파종기 간에 다소 차이는 있지만 파종기가 지연됨에 따라 증가된 반면 ADF와 NDF의 함량은 감소되어 DDM 함량은 증가되었다. 본 시험의 결과에 의하면 가을재배 수단그라스의 파종시기는 8월 20일 이전 귀리의 파종시기는 8월 30일 이전까지 파종해야 수량측면에서 유리할 것으로 생각된다.

• 한국초지조사료학회지
• /
• 제15권1호
• /
• pp.37-42
• /
• 1995

This experiment was canied out to study the effects of seeding and harvesting dates on the growth of early and late maturing rye(Seca1e cereale L.) varieties at the forage testing field of S.N.U., Suweon, from September 1986 to May 1989. Leaf and tiller numbers of rye per plant were increased with earlier seeding date, but no difference in the tiller numbers was found between harvesting dates of early and late maturing rye varieties. Tiller dry weight of an early maturing rye veriety, Wintermore was higher than that of a late maturing rye variety, Kodiak when sown as early as September. Maximun leaf area index(LA1) and leaf area index duration(LA1D) were achieved with earlier seeding and early maturing rye varieties. A higher correlation between the maximum LA1 or LAID and dry matter accumulation of rye varieties was observed in this experiment.

• 한국작물학회지
• /
• 제44권3호
• /
• pp.236-242
• /
• 1999

To examine the seedling stand and growth as affected by early seeding dates of dry direct seeded rice in the Honam plain area of Korea, Dongjinbyeo was seeded at six seeding dates from early March to late April in rice fields of silty loam soil(Jeonbuk series) at the National Honam Agricultural Experiment Station (NHAES) for two years, 1996 and 1998. Seedling stand decreased slightly. with an early seeding date, but it produced more than the optimum seedling number except for the seeding of 25 March in 1996. Days to emergence was significantly longer, as seeding date was earlier, and days to emergence by early seeding was shortened only by 8 days because the mean air temperature was lower in 1996 than average, while in 1998, the reduction effect was nine to twenty five days because the mean air temperature was higher than average. In early seeding, various weeds occurred at the emergence date of rice and dominant weeds were Alopecurus aequailis, Ludwigia prostata and Rorippa islandica. NH$_4$$^{+}$ -N content in the soil at the 5th leaf stage and maximum tillering stage were lower, as the seeding date was earlier when nitrogen was split applied as basal and top dressed in 1996, while it was not significantly different among seeding dates when nitrogen was intensively applied as a top dressing in 1998. Tiller number at the maximum tillering stage and panicle number/m$^2$ were more, as seeding date was earlier in 1996, while it was not different in 1998. Filled grain rate and 1,000 grain weight was not different among the seeding dates. Milled rice yield was significantly decreased in the seeding before the middle of March, but in the seeding after late March, it was not varied when compared with the normal seeding date in 1996, while in 1998, there was no difference among seeding dates. From the above results, in consideration of seedling stand, weed occurance, rice growth and milled rice yield, the critical optimum early seeding time in the southern plain area may lie in early April. But it was suggested that when soil moisture is proper for seeding practices, seeding amount is increased and nitrogen is applied after plumule emergence of rice, milled rice yield may not be reduced in the seeding of middle or late March, compared with the seeding in April.l.

• 한국초지조사료학회지
• /
• 제25권1호
• /
• pp.17-22
• /
• 2005

This experiment was conducted to investigate the effect of seeding dates and rates on the productivity and nutritive value of hairy vetch(Vicia villosa Roth) at experimental field of Grassland and Forage Crops Division, National Livestock Research Institute, RDA, Suwon from 1999 to 2000. The experimental design was consisted of split-plot design with three replications. The main plot was seeding dates(25 Aug., 15 Sep. and 5 Oct.) and the subplot was seeding rates(20, 30 and 40 kg/ha). Late seeding dates increased the plant height and delayed the flowering stage as 1 or 2 days. The dry matter(DM) content was decreased with low seeding rates, and the trend was same in the all plots. Average crude protein(CP) content was $24.1\%$ and increased with delayed seeding date and lower seeding rate. The content of acid detergent fiber(ADF) and neutral detergent fiber(NDF) was increased with higher seeding rate, but seeding date did not affect. In vitro dry matter digestibility(IVDMD) of hairy vetch tended to decrease with high seeding rate, and total digestible nutrient(TND) did not show significant difference among seeding rates. Average relative feed value(RFV) of hairy vetch showed 140 which means very high quality. Dry matter and CP yield was decreased with delayed seeding date. The results of this experiments indicated that seeding in middle-August with 40 kg/ha would be recommended to produce the highest yield and quality f3r the cultivation of hairy vetch in middle part of Korea

• 한국초지조사료학회지
• /
• 제24권2호
• /
• pp.115-122
• /
• 2004

본 시험은 옥수수 파종시기 5월 10일, 5월 20일 및 5월 30일을 주구로 옥수수 수확시기 9월 15일, 9월 25일 및 10월 5일을 세 구로 하여 분할구 배치법 3반복으로 2년간 축산연구소 한우시험장에서 수행하였다. 옥수수의 간장은 파종기가 5월 30일, 5월 10일 및 5월 20일순으로 작아졌으며, 수확기는 각 파종기 공히 10월 5일이 큰 경향이었다. 옥수수의 착수고는 파종기가 5월 20일, 5월 30일, 5월 10일순으로 작았고 파종기는 5월 10일, 5월 20일, 5월 30일순으로 낮아졌다. 파종기에 따른 옥수수 암이삭 비율은 파종기 5월 10일이 가장 높았다. 옥수수의 건물수량은 파종기가 늦추어짐에 따라 적어졌으며, 수확시기가 늦추어짐에 따라 높아졌다. 파종시기에 따른 옥수수 경엽의 조단백질 함량은 5월 10일보다는 5월 20일과 30일이 높았고 이삭은 5월 20일이 5월 10일이나 30일보다 높았다. 수확시기에 따른 경엽의 조단백질 함량은 파종시기에 관계없이 9월 15일이 가장 높았고 9월 25일과 10월 5일순으로 낮았으며, 이삭의 경우도 경엽과 비슷한 경향을 보였다. 경엽의 NDF와 ADF 함량은 수확시기가 지연됨에 따라 높은 경향을 보였다. 이상의 결과를 종합하여 볼 때 건물수량과 사료가치를 고려하면 파종시기는 가능하면 빨리 파종하는 것이 유리하나 고랭지에서는 너무 일찍 파종하면 늦추위에 냉해의 위험이 있기 때문에 5월 20일경에 파종하는 것이 안전하고, 수화시기는 너무 늦게 수확하는 것은 건물수량은 높아지나 사료가치가 감소되므로 대관령과 같은 고랭지에서는 만상일이 9월 28일인 점을 감안하면 9월 25일 이전에 수확하는 것이 적당할 것으로 생각된다.

• 한국작물학회지
• /
• 제37권6호
• /
• pp.541-549
• /
• 1992

벼 담수표면직파재배시 파종기 및 품종을 기상 및 재배 환경과의 관계를 구조적으로 분석하여 담수직파에서 흔히 발생하는 도복의 방상대책과 후기등숙생리를 검토한 결과는 아래와 같다. 1. 초기생육형수질중에서 출아일수는 조기파종일수록 길었으며 단립면적당 입묘수 및 입묘율은 파종이 늦을수록 그리고 만생종일수록 많고 양호하였다. 2. 단립면적당 수수는 파종이 늦을수록 감소하였으며 유효경비율은 만파인 5월 21일 파종구에서 가장 낮았다. 출수개화일수는 파종기가 늦을수록 단축되었으며 등숙기간중 강우분포는 조생종의 등숙기에 많았고 중ㆍ만생종의 등숙기에는 비교적 적었다. 파종기별 및 품종의 숙기별 포장도복정도는 파종이 빠를수록, 그리고 숙기가 빠를수록 컸다. 5. 수량 및 수량구성형질은 파종이 빠를수록 많고 양호했으며 특히 등숙비율은 그차이가 뚜렸하였다.