日光温室青椒滴灌最佳灌水下限组合试验研究

Experimental Research on the Lower Limit of the Most Appropriate Soil Moisture Content for Green Pepper Irrigation under Drip Irrigation in Greenhouse

为探讨日光温室滴灌条件下青椒最佳灌水下限组合,通过小区试验方法分析了滴灌条件下5种不同灌水下限组合对青椒形态、品质、产量及灌溉水利用效率的影响。结果表明：不同灌水下限组合对青椒株高、茎粗、VC含量影响差异显著。对青椒产量的影响差异不显著。采用主成分分析法对各灌水下限组合进行了量化的综合评价。评价得分显示：当青椒苗期、开花着果期及结果期的水分下限分别控制在田间持水量的50%~60%、50%~60%7、0%~80%时得分最高,表明该处理下青椒产量最高、品质最佳、灌溉水利用效率最高,其为青椒最佳灌水下限组合。

In order to determine the lower limit of the most appropriate soil moisture of the greenhouse pepper under drip irrigation,the field experiment was conducted and the effect of 5 soil moistures of different kinds on green pepper shape,quality,yield and irrigation water use efficiency was analyzed.The results show that different soil moistures have a significant effect on plant height,stem diameter,VC content of pepper.But pepper yield is not significant.The results of a comprehensive evaluation based on principal component analysis show that the evaluation score is the highest during the period of green pepper seedling,flowering,fruiting,the lower limit of the soil water content are controlled at 50%~60% of field capacity,50%~60%,70%~80%,which indicates it is the lower limit of the most appropriate soil water content to obtain the highest yield,the best quality of green pepper,the highest irrigation water use efficiency.