| Studies were conducted in Ma Zhuang experimental station of Agricultural University of Hebei in2013. The physiological indicators and mineral nutrient absorption regulation of high-yielding population summer maize were studied using Denghaill22, Denghai618and Weike702as materials, to clear the absorption characteristics of high yielding summer maize suitable group and individual physiological indexes and nutrient.this study is of great importance in providing theoretical basis for cultivation technology system and physiological indices of high-yielding summer maize. The results showed as follows:1. The yield components of high-yielding summer maize which yield exceeded10500kg/hm2were showed as follows:suitable plant density was75000plant/ha, harvest maize ear numbers not less than69000per hectare, kernel numbers per ear not less than500, harvest total kernel numbers more than3.9>×04thousand per hectare,1000kernel weight more than320g, HI was around0.5.2. The change of population leaf areas was fast at beginning, steady after silking, and decrease slowly at late stage. Maximum leaf area index (LAI) was around5, and the LAI kept at more than3at harvest stage. LAD was high at whole growing stage, and the LAD at silking stage was more than70%to whole growing period.3. Group of high-yielding summer maize have higher dry matter accumulation, dry matter accumulation in the above20000kg/hm2high yield population, the dry matter accumulation after silking account for total dry matter accumulation of more than60%. At the same time, high yield of summer maize with high transferred dry matter, dry matter transfer volume more than14g.4. Different varieties of high-yielding summer maize in the nutrient demand similar, the general order of it was:N>K>P, high yield varieties was greater than the low yield varieties. The intake to every nutrient necessary for maize was:1.83kg for Nitrogen,0.44kg for P2O5,1.71kg for K2O for every100kg kernels. |
PDF Full Text Request