Study on the Integration Technology of Drip Irrigation Fertilizer Under Corn Membrane in Yanghuang Irrigation Area of Ningxia
[Objective]To analyze the effects of submembrane drip irrigation fertilizer integration on maize yield and water use efficiency,elu-cidate the technical advantages of submembrane drip irrigation fertilizer integration,solve the problem of low utilization efficiency of corn fertil-izer in Yanghuang irrigation area of Ningxia.[Method]At the same level of fertilization,the irrigation(6000 m3/hm2) was used as a control,two treatments of non-coated drip irrigation and submembrane drip irrigation were set on the basis of a drip irrigation quota of 3750 m3/hm2,the effects of different irrigation treatment on photosynthetic characteristics,yield,utilization efficiency and economic benefits of maize were studied.[Result]The integrated technology of submembrane drip irrigation water fertilizer was the highest in net photosynthetic rate and water use efficiency during the maize pumping period,which was 1.5％ and 11.0％ higher than that of diffuse irrigation,and 6.1％ and 3.2％ high-er than that of non-coated drip irrigation. The integrated technology of submembrane drip irrigation water fertilizer increased corn yield by in-creasing the number of ears,grain number and grain weight of corn,which increased by 8.6％ compared to the diffusion irrigation treatment and 8.2％ more than the non-mulching drip irrigation treatment. The integrated technology of submembrane drip irrigation water fertilizer re-duced the water consumption of corn,which was 28.4％ lower than that of diffuse irrigation,73.6％ higher irrigation efficiency,and 52.0％ water use efficiency. At the same time,the partial productivity of corn nitrogen,phosphorus and potassium fertilizer was increased by 8.5％,8.6％ and 8.5％,respectively. Compared with diffusion irrigation treatment,the integrated technology of submembrane drip irrigation fertilizer had achieved the highest economic benefits on the basis of a 26.9％ increase in cost input,an increase of 808.4 yuan/hm2 compared to diffu-sion irrigation treatment,an increase of 8.1％ in income,and an increase of 787.5 yuan/hm2 compared to non-mulching drip irrigation,the in-come increased by 7.8％.[Conclusion]Using submembrane drip irrigation and fertilization on the basis of 3750 m3/hm2 drip irrigation can a-chieve an increase in production and income on the basis of 37.5％ water saving. This technology has certain advantages in the Yanghuang ir-rigation area of Ningxia and can be applied to the corn production in the area.
Ningxia Yanghuang irrigation districtSubmembrane drip irrigation fertilizer integrationCornYieldWater use efficiency
万方数据
维普
