论文部分内容阅读
试验分别于2013和2014年在中国农业科学院新乡综合试验基地进行,以20 cm蒸发皿蒸发量(Ep-20)为灌水依据,设置5种水面蒸发系数(Kcp1:0.25;Kcp2:0.5;Kcp3:0.75;Kcp4:1.0;Kcp5:1.25)代表5种灌水水平,分析了不同水量(Ir)对温室黄瓜滴灌耗水量(ET)、产量、品质以及水分利用效率(WUE)的影响,探讨了以Ep-20制定温室滴灌灌水计划的可行性.结果表明:温室滴灌黄瓜整个生育期内的耗水量在129~314 mm,耗水量随着灌水量的增加而增加.当灌水量超过0.75Ep-20时,各处理之间的产量无差异,平均单果质量、单株瓜条数和平均瓜长对灌水量的响应均存在一个阈值(0.75Ep-20);品质方面,可溶性固形物、维生素C和可溶性糖含量均随着灌水量的增加而降低,而可溶性蛋白质含量为:Kcp2>Kcp3>Kcp4>Kcp1>Kcp5;采用修正后的Penman-Monteith公式计算温室滴灌黄瓜参考蒸发蒸腾量所得结果与Ep-20呈极显著线性相关关系.可见,在华北地区日光温室黄瓜的滴灌灌水制度选用0.75倍的20 cm蒸发皿水面蒸发量作为灌水依据简单可行.
The experiment was carried out in Xinxiang Integrated Test Base of Chinese Academy of Agricultural Sciences in 2013 and 2014 respectively. Five evapotranspiration coefficients (Kcp1: 0.25; Kcp2: 0.5; Kcp3: 0.75, Kcp4: 1.0 and Kcp5: 1.25) were used to represent the five irrigation levels. The effects of different irrigation rates (Ir) on drip irrigation water consumption (ET), yield, quality and water use efficiency (WUE) of greenhouse cucumber were analyzed. -20 to establish the feasibility of drip irrigation program in greenhouse.The results showed that the water consumption of drip irrigation cucumber in the greenhouse was 129-314 mm during the whole growth period and the water consumption increased with the increase of irrigation amount.When the irrigation volume exceeded 0.75Ep-20 (0.75Ep-20) in response to irrigation volume. In terms of quality, the content of soluble solids, vitamin C and soluble The content of soluble protein decreased with the increase of irrigation volume, while the content of soluble protein was: Kcp2> Kcp3> Kcp4> Kcp1> Kcp5. The corrected Penman-Monteith formula was used to calculate the reference evapotranspiration of greenhouse drip cucumber. There was a very significant linear correlation The cucumber drip irrigation system in the solar greenhouse in North China selected 0.75 times the evapotranspiration of 20 cm evaporating dish as a simple and feasible basis for irrigation.