Effects of Climatic Factors varied due to the Type of Plastic House, Cultural Season and Locations in the Plastic House on the Growth of Cucumber Plants Grown in Rockwool

This experiment was conducted to investigate the effects of climatic factors varied due to the type of plastic house, cultural season and location in the house on the growth of cucumber plants grown by nutrient solution. There were two growing periods, summer culture and retarding culture, two types of plastic houses, 1-2W type house and post-less house. Air temperature, relative humidity and amount of solar radiation in the plastic houses were measured. Also, dry weight of leaves and stems, plant height, number of leaves per plant, leaf area per plant and fresh weight of fruits per plant were observed. Plant growth analysis were conducted and interrelationships between climatic factors and physiological characteristics were investigated. The results were as follows. There were no differences between the type of plastic houses in the average air temperature and average relative humidity in the plastic house, but amount of solar radiation in 1-2W type house was significantly higher than that of postless house. Daily cumulative solar radiation were highest in southwest side of 1-2W type house and northwest side of postless house. Plant height and number of leaves per plant were higher in summer culture than retarding culture, while leaf area per plant was higher in retarding culture than summer culture. Relative growth rate (RGR) showed highly significantly positive correlations with net assimilation rate (WAR) and leaf area ratio (LAR). Contribution of NAR to RGR was much higher than that of LAR. Crop growth rate (CGR) showed highly significantly positive correlations with leaf area index (LAI). It appeared that increase of LAI was important to increase productivity of cucumber. Average daily air temperature for the whole growing period showed highly significantly positive correlations with RGR and NAR. Furthermore, cumulative solar radiation for the whole growing period in retarded culture showed significantly positive correlation with RGR and NAR.

Plastic house의 형태, 재배양식 및 시설내 위치에 따른 기상환경의 차이가 암면재배 오이의 생장에 미치는 영향

재배시기, 시설형태 그리고 시설내 계배위치에 따른 가상환경의 차이와 이에 따른 양액계배 오이의 생장 반응을 알아보기 위하여 여름재배와 억제재배, 1-2W형 하우스와 무기둥 하우스에 양액계배를 통해 오이를 패배한 후 시설내 부위별 기온, 상대습도, 일사량과 생장해석을 통해 얻어진 생리적 형질들을 조사하여 비교한 결과는 다음과 같다. 하우스 내부의 평균기온이나 평균상대습도는 하우스 형태간 유의한 차이가 없었으나 일사량은 1-2W형 하우스가 무기둥 하우스에 비해 유의하게 높았다. 일누적일사량은 1-2W형에서는 남서쪽이 무기둥 하우스에서는 북서쪽이 대체로 높았다. 초장과 엽수는 억제재배보다 여름재배에서 높게 나타났으며 엽면적은 억제재배에서 많았다. 상대생장율은 순동화율 및 엽면적비율과 고도로 유의한 정의 상관관계를 보였으며 상대생장율에 대한 기여도는 순동화율이 엽면적비율보다 높은 것으로 나타났다. 작물생장율은 엽면적지수와 고도로 유의한 정의 상관을 보여 엽면적지수의 증대가 단위면적당 생산량의 증대에 크게 영향하는 것으로 나타났다. 전 생육기간의 일평균기온는 상대생장을 및 순동화율과 고도로 유의한 정의 상관관계가 있었다. 억제재배에서는 전 생육기간의 누적일사량과 상대생장을 및 순동화율과 유의한 정의 상관관계가 있었다.