Abstract
Objective of this research was to investigate the effect of fertigation setting point such as -5, -10, -20, and -30 ㎪ on the growth and fruit quality of sweet pepper (Capsicum annuum L.) in greenhouse culture. The net $CO_2$ assimilation and transpiration rate were the lowest in the treatment of -30㎪. The pH and EC in soil solution were not severly affected by irrigation setting point and no statistical differences were observed among treatments of irrigation setting point tested. The N content of above ground plant tissue was the lowest in the treatment of -30 ㎪ and those of K, Ca, and Mg were the highest in the treatment of -10 ㎪. But that of P did not show statistical differences among treatments tested. As the fertigation setting point was getting low, the growth decreased at 60th day after planting, while there were no differences among treatments at 210th day after planting. The fruit quality except sugar contents did not show differences among treatments, but sugar contents was the highest in the treatment of -30 ㎪ with $8.0^{\circ}$Brix. Above results indicated that fertigation setting point should be in the range from -10 ㎪ to -20 ㎪ to ensure good crop growth and fruit quality in sweet pepper production.
착색단고추 관비재배 시 토양수분함량이 생육 및 품질에 미치는 영향을 구명하여 생산성 향상을 위한 기초자료로 활용코져 수행하였다. 광합성속도 및 증산속도는 토양내 수분량이 적은 -30 ㎪에서 낮았으며, 토양의 pH와 EC는 수분함량에 따른 큰 변화 없이 안정적이었다. 식물체의 전질소 함량은 -30 ㎪에서 가장 낮았으며, 칼륨, 칼슘, 마그네슘은 -10 kPa에서 가장 높았고, 인산은 처리간에 유의성이 없었다. 정식 60일째의 생육은 토양수분함량이 낮아질수록 저조하였으나 정식 210일째는 토양수분함량간에 유의성이 없었다. 품질은 토양수분함량에 따른 유의성이 없었으나 당도만 -30 ㎪에서 $8.0^{\circ}$Brit로서 가장 높았다. 따라서 착색단고추 관비재배를 위한 토양수분의 함량은 -10 ㎪∼-20 ㎪에서 생육 및 품질이 양호하였다.
