High-efficiency Cultivation And Benefit Analysis Of Forage Corn Based On Integration Of Water And Fertilizer

There are some problems such as low rainfall,high evaporation,low rate of water-fertilizer utilization and low economic analysis in the irrigated area of yellow river in Yanchi County,Ningxia."no.9" is used as experimental material,studying appropriate drip-irrigation amount,optimum dosage of drip-irrigation fertilizer,used ratio of N/P/K and so on as critical parameters with the mode of water-fertilizer integration and mechanical sowing in the central and arid zone of China,and increase yield and economic effects of forage corn at the condition of different irrigated and fertilizing amount.Optimizing technology of high-quality and high-efficient cultivation of corn grain corn,which suitable for local soil and climate,providing theoretical theoretical foundation for improving fully utilization efficiency of finite and water-fertilizer resources,achieving improvement of soil and fertility and increasing the yield and efficiency of forage cornMain results of this test as follow:(1)Research of water-regulation demand and optimal irrigation of forage corn:On the basis of 60kg/667m~2 that have unified fertilization,with increase of drip-irrigation amount,growth indicators of plant height,stem diameter,chlorophyll values(SPAD),net photosynthetic e and so on of forage maize increase.Dry matter accumulation of forage maize of all treatments increase as increasing of drip-irrigation amount,and this tread is largest at filling stage.Plant height,stem diameter,fresh weight of above ground,dry matter accumulation of forage corn are all largest,and significantly increase yield of grain of forage maize.Quadratic equation of relationship of yield and drip-irrigation amount is y=-0.0226x2+11.574x-345.89,R2=0.965.founding that yield of forage maize is largest at 256 m3/667m~2 of drip-irrigation amount from fitted equation,drip-irrigation amount of optimum economic benefit is 255.51 m3/667m~2(2)Forage maize special drip irrigation fertilizer applying best conten t research:applying the best content in the irrigation water is 205 m3/205 m~2,with the increase of applying dropper fat content,forage maize plant height,stem diameter,grain weight,relationship to corn nutrients in the water soluble fertilizer and the output equation of the simulation,the optimum irrigation forage corn fat seems to 71.76 kg/667 m~2,applying drip fat content is 57.97 kg/667 m~2 can obtain the maximum economic benefit.(3)Nitrogen phosphorus and potassium have influence on chlorophyll content,net photosynthetic rate,growth index and yield.Though comparing nutritional deficiency with 60 kg/667m~2 that water soluble fertilizer of drop irrigation of full nutrition is fertilized,results show that:dry matter accumulation and yield of forage maize decrease compared to balanced fertilization under the treatment of nutritional deficiency,and significantly decrease amount of nutrient absorption.Nitrogen have biggest significance on all indicators and yield of forage maize,utilization rate of N/P/K of forage maize are 53.94%?44.85%and 63.72%respectively at integration of water and fertilizer in wind-sand region,which exceed the 33.28%?15.43%and 48.79%of utilization rate of N/P/K at condition of conventional fertilization,integration of water and fertilizer immensely enhance utilization efficiency of limited water and resources in semi-arid region...