The Effect Of Density And Fertilization Amount On Photosynthetic Performance And Yield Of Maize

Demeiya 1 as the research object, studying the effects of different cultivation measures(density, nitrogenous fertilizer, phosphate fertilizer, potash fertilizer) on Yield and yield components effect, find out the best agronomic plan, provide the technical basis for the standardized cultivation of Heilongjiang maize of high yield, high standard. The test with two factor split plot design, the main factor for the treatment of fertilizer A a total of 3 levels, namely A1(280kg/hm~2, 210kg/hm~2, urea ammonium potassium sulfate 70kg/hm~2(A2), 400kg/hm~2, 300kg/hm~2, urea ammonium potassium sulfate 100kg/hm~2(A3), 520kg/hm~2, 390kg/hm~2, urea ammonium potassium sulfate(130kg/hm~2); the planting density B) as Deputy District, set 5 different planting densities(60000, 75000, 90000,105000 and120000 strains of hm-2), in the growth of Maize during the growth period, leaf area index(LAI), monitoring of Maize Photosynthetic potential(LAD), chlorophyll content, net photosynthetic rate(Pn), net assimilation rate(NAR) maize canopy structure characteristics and changes of physiological indices, the main results are as follows:1 Effects of fertilizer rate and population density on Yield and its components of MaizeThe yield of maize increased firstly and then decreased with the increase of fertilization amount and density. High fat and high density planting mode for yield improvement, but not the higher Yumi healed, fertilizer density processing are combined to yield in a2b3 treatment(urea 400kg/hm~2, diammonium phosphate 300 kg / hm~2, potassium sulfate / and 90000 plants / hm~2) was the highest, a3b3 processing times, effect of fertilizer and density on Maize Yield reached significant level and fertilizer and density of significant interaction effects.2 Effects of fertilizer application rate and population density on Photosynthetic Characteristics of Maize PopulationsBoth LAI and LAD increased significantly with the increase of population density and fertilization, and the net assimilation rate increased significantly with the increase of density, and the net assimilation rate of 60000,75000,90000 plants/hm-2, was significantly higher than that of 105000 hm-2 and 120000 hm-2 in the whole growth period. Increasing the amount of fertilizer could significantly improve the net assimilation rate of maize leaves, but the effect of fertilization was decreased. Chlorophyll content with the increase of density decreased and showed the first increased and then decreased trend with the increase of fertilizer; maize leaf Pn with after silking leaf ageing is decreased, decreased with the increase of density, and with the increase of the amount of fertilizer increased significantly.3 Effects of fertilizer application rate and population density on dry matter accumulation and physiological characteristics of MaizeUnder different density, B3 density place an order of dry matter accumulation of culm average density was significantly higher than the other. Different amount of fertilizer, fertilizer A2 average stem dry weight was significantly higher than that of other fertilizer. With the increase of population density, grain filling rate decreased, significantly higher than that of low density high planting density. Suitable population density, the use of reasonable fertilizer, can improve the activity of antioxidant enzymes in maize leaves, reduce the damage of cells, reduce the degree of membrane peroxidation, and make the leaves have a relatively longer functional period, but with the increase of population density, the plant density, the physiological activity of the leaves of the plant decreased. Comprehensive production and other aspects of the analysis, the overall performance of the A2B3 process is the best, can be used in the experimental area.