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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。
The use of PVC tube for different particle size and application of water-holding agent test, the setting of granular water-holding agent and particle-type water retention agent, each particle size set three application doses, with no water agent as a control to discuss the different particle size , The effects of different application rates on the yield and photosynthetic characteristics of maize and their effects on the water storage capacity of maize. The results showed that application of SAP could significantly increase maize yield and photosynthetic traits, and significantly increase soil water content and water use efficiency. Comprehensive performance ability, fine type is better than the granular type, the best application rate of fine grain is 45 kg / hm2, and the optimal granular dosage is 60 kg / hm2.