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采用田间试验、植株生理生化分析方法,研究了不同施氮量对高淀粉玉米吉单535和普通玉米军单8号子粒产量形成的影响。结果表明,高淀粉玉米粒重的增长符合Logistic方程;营养体干重随时间的变化符合回归方程Y=axebx;生物产量依子粒产量和营养体干重变化符合回归方程Y=exp(a+b1x1+b2x2)。与普通玉米军单8号比较,高淀粉玉米吉单535营养体干重增长期较长,干重下降速率低,即由营养体干物质向子粒转运量较低。适宜的施氮量可有效地促进高淀粉玉米植株生育前期总生物量的积累以及生育后期干物质从营养体向子粒的转移,从而获得较高产量。高淀粉玉米吉单535的适宜施氮量为200kg/hm2。
Field experiment and physiological and biochemical analysis of plant were used to study the effects of different nitrogen rates on grain yield of high-yielding corn Yidan 535 and ordinary corn. The results showed that the grain weight growth of high-starch corn accorded with Logistic equation. The change of dry weight of the nutrient body with time was in accordance with the regression equation Y = axebx. The yield of the bio-yield grain and the dry weight of the nutrient body accorded with the regression equation Y = exp (a + b1x1 + b2x2). Compared with the normal maize Jundan 8, the high-starch corn Jidan 535 had a long dry weight growth period and a low rate of dry weight decline, ie, the transport of dry matter to the grain was relatively low. Appropriate amount of nitrogen fertilizer can effectively promote the accumulation of total biomass of high starch maize plant during early growth period and the transfer of dry matter from vegetative body to grain during later growth period, so as to obtain higher yield. Suitable nitrogen rate of high starch corn Jidan 535 was 200kg / hm2.