日光温室黄瓜节水灌溉研究

对比分析了日光温室黄瓜滴灌、膜下沟灌和畦灌 3种灌水方式对温室环境、黄瓜耗水量、产量、品质的影响以及这 3种灌溉方式下温室黄瓜的年产出投入比。结果表明 :日光温室滴灌比畦灌温室内空气相对湿度降低 1 0 %～ 1 5%,冬季地温提高 3～ 8℃ ;黄瓜耗水量减少 4 3 .4 %,灌溉水节约 59.9%;黄瓜增产 3 3 %,产值增加 6.75万元 /hm2 ;黄瓜粗蛋白含量和可溶性糖均高 4 %;提早 1 0 d左右上市 ;年产出投入比高 1 .0 1。膜下沟灌比畦灌使温室内空气相对湿度降低 1 3 %左右 ;黄瓜耗水量减少 1 3 .6%,节约灌溉水 2 0 %;黄瓜产量提高1 3 %,产值增加 3 .1 5万元 /hm2 ;年产出投入比提高 0 .82

The Study of Water-saving Irrigation of Cucumbers Grown in Sunlight Greenhouses

In this paper, an analysis is made by comparing the effects of three irrigation techniques, including drip irrigation, furrow irrigation under membrane and border irrigation, on the greenhouse environment, water consumption, yield and quality when they are used for the irrigation of cucumber grown in sunlight greenhouses and by comparing the output and input ratio when cucumber is grown in greenhouses where the same three irrigation techniques are adopted. The results indicate that, compared with border irrigation, drip irrigation lowers the relative humidity of the air in the greenhouse by 10 15%, increases ground temperature by 3 8 ℃ in winter, reduces water consumption of cucumber by 43.4%, whichmeans a saving of irrigation water by 59.9%, raises cucumber yield by 33%, achieves an output value increment of 67,500 yuan (RMB)/hm 2, increases the contents of crude protein and soluble sugar both by 4%, makes the marketable date of cucumber 10 days earlier and enhances the annual output and input ratio by 1.01. Also compared with border irrigation, furrow irrigation under membrane lowers the relative humidity of the air in the greenhouse by about 13%, reduces water consumption of cucumber by 13.6%, which means a saving of irrigation water by 20%, raises cucumber yield by 13%, achieves an output value increment of 31,500 yuan (RMB)/hm 2 and increases the annual output and input ratio by 0.82.