| Water and fertilize are the main agricultural production, but can control the two important technical measures.Semi-arid regions in western Heilongjiang province has great potential in agricultural production, unreasonable fertilizer application was the main reason to restrictied water potential. This field was in west semiarid areas of Heilongjiang province. This field experiment was to explore the influence water and fertilizer coupling on soybean yield ,biological properties and soil moisture aspects by drip irrigation and to established in irrigation and water conditions of soybean production of nitrogen coupling effect equation. so as to explore the effect of equations suitable water-saving fertilization of this area optimization model. To explore this area applies to the optimization of water-saving fertilization was the ultimate goal.(1)The field experiments showed that nitrogen and water are for soybean production yield effect.The order is influencing strength : main effect of N fertilizer than water main effect .Inncrease unit area level of nitrogen increased more than the soybean production increased irrigation water will increase soybean production.(2)Output effect by regression equations, interaction coefficient for water and nitrogen increased output coupling with each other.(3)Application simulation optimization analysis in west semiarid areas of Heilongjiang provinc,to obtain 2223 kg/ hm2 soybean yield, fat and irrigation with optimal combination scope is: for 90 kg/ hm~2 P dosage and 75 kg/ hm~2 K dosage, nitrogen rates 85.53-105.95 kg/ hm~2, irrigation 1085.31-1229.00 m~3/hm~2 .(4)The yield of soybean constitute factors, leaf area index, plant height, stem diameter, dry matter accumulation, harvest index, pod growth are different degree of coupling effect.(5)In field conditions, the yield of crop and water consumption affected by many factors, thus crop yield, water consumption and water use efficiency in the linear relationship is not simple. |
PDF Full Text Request