保水剂不同粒型及施用量对玉米产量和光合性状的影响

Effects of Different Grain Size and Amount of Water Retaining Agent on Yield and Photosynthetic Characteristics of Maize

利用PVC筒进行保水剂不同粒型和施用量试验,设置细粒型保水剂和颗粒型保水剂,每种粒型设3个施用剂量,以不施保水剂为对照,探讨保水剂不同粒型、不同施用量对玉米产量和光合性状的影响及对淡黑钙土蓄水能力的影响。结果表明,施用保水剂可极显著提高玉米产量和光合性状,极显著提高土壤含水率及水分利用效率。综合表现能力,细粒型优于颗粒型,细粒型最佳施用量为45 kg/hm2,颗粒型最佳施用剂量为60 kg/hm2。

In order to discuss the effects on different grain sizes and application amounts of water-retaining agent on yield and photosynthetic characteristics of maize, and water storage ability of light chernozem. The test was carried out with PVC tubes. There were two kinds of different particle sizes, one was fine grain type the other was granule type, and they were named US and XM. Three application amounts were set for each grain type, and the control group was not water retaining agent. The results showed that, the application of water retaining agent could significantly improve maize yield and photosynthetic characteristics, and greatly improve the soil water content and wa- ter use efficiency. The comprehensive performance ability, fine grain type water retaining agent US was superior to the particle type water retaining agent XM. The best application amount of US was 45 kg/ha, but the best dosage of XM was 60 kg/ha.