论文部分内容阅读
选用抗旱性品种抗线7号、黑农65、绥农15为试材,利用全生育期大豆相对化LAI动态模型归一法,分析大豆抗旱品种“三合结构”定量方程及参数间函数关系。结果表明:3个品种相对LAI动态定量方程均符合y=(a+bx)/(1+cx+dx2),同一品种动态模型、光合参数及产量构成参数变化趋势年际间相同,而同一年内不同品种间各参数差异达极显著水平;高产品种具有较高的单株粒数和平均净同化率;3个抗旱品种产量与平均作物生长率、收获指数、平均净同化率、单位面积粒数、单株粒数和单株粒重均呈正相关,且产量主要决定于前两个因素。因此,通过改变外界栽培条件,提高群体平均生长率和单位面积粒数,保证群体具有较高收获指数,可最终实现大豆高产。
The drought resistant varieties Line 7, Heinong 65 and Suinong 15 were selected as experimental materials, and the LAI dynamic model normalization method was used to analyze the quantitative equation and parameter of soybean drought resistant cultivars ’’ triple structure ’’ Functional relationship. The results showed that the relative dynamic LAI of the three cultivars all accorded with y = (a + bx) / (1 + cx + dx2). The trend of the change trend of photosynthetic parameters and yield components in the same species was the same The differences of the parameters among different cultivars reached extremely significant level. The high-yielding cultivars had higher grain-number per plant and average net assimilation rate. The yield and average crop growth rate, harvest index, average net assimilation rate, grain yield per unit area , Grain number per plant and grain weight per plant were positively correlated, and the yield was mainly determined by the first two factors. Therefore, by changing the external cultivation conditions, increase the average growth rate of population and grain per unit area, to ensure that the group has a high harvest index, and ultimately high-yield soybean.