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本文过通1985～1986二年校内外结合试验,应用二次回归正交设计方法,研究了密度、施氮量对丹玉13号、沈单7号、朝23×5003三个单交种亩产600～700公斤的群体的光合作用系统及其对籽粒产量的影响:丹王13亩产630～640公斤的叶面积指数动态模式为(?)=e~(35.3)x~(5.4)(130—x)~(3.5),单位面积干物质累积规律呈 S 曲线型,生物产量为1436～1554.8公斤/亩,经济系数44%;沈单7号720～730公斤的叶面积指数动态模式为(?)=e~(-25.7)x~(4.2)(150-x)~(2.14),生物产量亩产1600～1700公斤,经济系数43～45%,并找出不同地区单交种的最佳密度与施纯氮量的组合。
In this paper, two years from 1985 to 1986, combined with the experiment inside and outside the school, the application of quadratic regression orthogonal design method to study the density, nitrogen application of Dan Yu 13, Shen No. 7, North Korea 23 × 5003 The photosynthesis system of 600 ~ 700 kg group and its effect on grain yield: The dynamic model of leaf area index of 630 ~ 640 kg in Dan Wang 13 mu is (?) = E ~ (35.3) x ~ 5.4 130-x) ~ (3.5). The accumulation pattern of dry matter per unit area was S-curve with the biomass of 1436-1558.8 kg / mu and the economic coefficient of 44%. The leaf area index of 720-730 kg in Shendan 7 was (?) = e ~ (-25.7) x ~ (4.2) (150-x) ~ (2.14), biological yield per mu 1600 ~ 1700 kg, economic coefficient 43 ~ 45%, and to find out the different regions of single cross-species The combination of optimum density and nitrogen content.