填闲作物在日光温室黄瓜生产中的应用效果

目的]提高目光温室氮素利用率，减少硝态氮累积。方法]在黄瓜收获后的夏季休闲季选择玉米、大葱作为填闲作物，以休闲处理为对照，研究玉米、大葱对日光温室后茬黄瓜产量及土壤残留硝态氮累积量的影响。结果]在填闲作物生长季中不施用任何肥料，玉米、大葱仍获得较高的经济产量，分别达到8．5t/hm^2和54．0t／hm^2，且种植玉米、大葱没有影响后茬黄瓜的产量以及外观品质；休闲夏季种植玉米、大葱后，0—120cm土壤各土层NO3^--N累积量显著低于休闲处理，不会引起较强的硝酸盐淋失。结论]在休闲夏季种植玉米、大葱是有效降低目光温室黄瓜生长季土壤硝态氮残留的有效途径之一。

Effects of Catch Crop on Cucumber Production in Solar Greenhouse

Objective] The study aimed to enhance utilization ratio of nitrogen fertilizer and decrease the accumulation of soil NO3——N.Method] A field experiment was conducted to investigate effects of catch crop(maize and scallion) which were planted in summer after cucumber harvest on later stubble cucumber yield and soil NO3——N accumulation in solar greenhouse.Result] The yield of maize and scallion without any fertilizer in the growth stage were 8.5 t/hm2 and 54.0 t/hm2,respectively.Furthermore,later stubble cucumber yield and appearance quality were not significantly changed by planting catch crops.NO3——N accumulation in the soil profile(0～120 cm) was significantly reduced by the planting maize and scallion in leisure summer,compared with check,which planting nothing.Conclusion] Planting maize and scallion in leisure summer was an approach which effectively decreased the residue of soil NO3——N in the cucumber production in solar greenhouse.