Study On The Optimal Nutrient Ratio Of Corn Drip Fertigation

Drip Irrigation under according to crop growth and development needs to be mixed with water soluble fertilizer together and driven by water transport fertilizer, the use of drip irrigation tape transport, applied directly to the root zone of maize, to create a good environment for the growth of crop growth and development, to enhance the role of fertilizer utilization. This test uses drip irrigation under mulch fertilization methods under field conditions, the ratio of different nutrients on maize production, and to determine the optimal ratio of fertilizer. The main conclusions are as follows:(1) Under the condition of different feed and distribution ratio, the whole growth period of maize showed the trend distribution of the plant type, and the leaf area index was lower than that of the parabola type. The plant height and leaf area index of 0.5:0.25:0.25(N 120 kg·ha-1, P 60 kg·ha-1, K 60 kg·ha-1) were the largest, and there were significant differences between treatments with different treatments.(2) Maize stalk, leaf dry matter accumulation with growth process to promote a gradually increasing trend, nutrient ratios for 0.5:0.25:0.25 (N 120 kg·ha-1, P 60 kg·ha-1, K 60 kg·ha-1). During the whole growth period of dry matter accumulation and CK treatment of dry matter accumulation of minimum amount that balanced fertilization promote plant growth, accelerate the accumulation of plant biomass.(3) Different nutrient proportion of output size:Ⅳ>Ⅲ>Ⅱ>Ⅰ>CK and yield of each treatment and CK respectively increase 30.55%and 26.35%,15.23%,11.01%; different nutrient ratios for the protein content of maize grain size distribution:Ⅳ>Ⅲ>Ⅱ>Ⅰ>CK and fat content of corn grain size is of the order of Ⅳ>Ⅲ>Ⅱ>Ⅰ>CK , namely raising distribution ratio 0.5:0.25:0.25 (N 120 kg·ha-1, P 60 kg·ha-1, K 60 kg·ha-1), yield and quality of maize the index optimal.(4) Through the method of grey correlation analysis of maize soil physical and chemical properties and yield and quality association degree, get in jointing stage, available K, organic matter content, available phosphorus and yield of maize, relationship quality closely; in maize tasseling stage, available K, organic matter content, quick acting nitrogen and maize yield, relationship quality closely.(5) Through the principal component analysis of maize soil physical and chemical properties and comprehensively assess the quality, nutrition ratio 0.5:0.25:0.25 (N 120 kg·ha-1, P 60 kg·ha-1, K 60 kg·ha-1) best; on the yield and quality of maize were principal component analysis, when nutrient proportion is 0.5:0.25:0.25 (nitrogen 120 kg kg HA-1, phosphorus 60 kg HA-1, potassium 60 kg kg HA-1) and principal component scores were the highest.