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通过模拟“玉米-大豆”带状套作,采用灰色关联分析法分别分析了高产材料(≥1 500 kg·hm-2)的产量、高蛋白材料(≥50%)的蛋白质含量、高脂肪材料(≥20%)的脂肪含量与农艺性状的相关性。结果表明:3种类型大豆材料中,有6个农艺性状的变异系数都大于10%,特别是高脂肪材料的底荚高、分枝数和单株荚数的变异系数均大于30%,说明通过农艺性状的选择,提高大豆产量、蛋白质含量和脂肪含量的潜力较大。套作下高产材料、高蛋白材料和高脂肪材料与农艺性状的关联顺序分别为:生育期>株高>分枝数>底荚高>单株荚数>百粒重>主茎节数;生育期>主茎节数>株高>底荚高>分枝数>百粒重>单株荚数;生育期>底荚高>百粒重>株高>主茎节数>分枝数>单株荚数。套作下,高产材料的产量与蛋白质含量呈极显著正相关(r=0.873**),与脂肪含量呈显著负相关(r=-0.709*);高蛋白材料的产量与蛋白质含量、高脂肪材料的产量与脂肪含量相关均不显著。以上结果表明,选择生育期长的品种可提高套作大豆产量、蛋白质及脂肪含量;选择分枝数、单株荚数较多和株高适中的品种可以同时提高套作大豆产量与蛋白质含量;加强对底荚高和百粒重的选择有望提高套作大豆脂肪含量。
The yield of high-yielding material (≥1 500 kg · hm-2), the protein content of high protein material (≥50%), and the protein content of high protein (≥50%) were analyzed by using gray correlation analysis Correlation of fat content and agronomic traits in fatty material (≥20%). The results showed that the coefficient of variation of 6 agronomic traits in all three types of soybean materials was more than 10%. Especially for the high-fat materials, the bottom pod height, the coefficient of variation of branch number and pods per plant were more than 30% Through the choice of agronomic traits, there is great potential for increasing soybean yield, protein content and fat content. The order of association of high protein material, high protein material and agronomic traits under high yielding materials was as follows: growth period> plant height> number of branches> number of bottom pods> number of pods per plant> 100-grain weight> number of main stems; Growth stage> number of main stems> plant height> end-pod height> number of branches> 100-grain weight> pods per plant; growth period> end pod height> 100-grain weight> plant height> number of main stems> number of branches > Pods per plant. There was a significant positive correlation between yield and protein content (r = 0.873 **) and a significant negative correlation with fat content (r = -0.709 *). The yield and protein content of high protein material, Material yield and fat content were not significant. The above results showed that the selection of long-growing varieties can increase the yield, protein and fat content of intercropped soybean; the selection of the number of branches, the number of pods per plant and moderate plant height can increase the yield and protein content of intercropped soybean at the same time; Strengthening the choice of pod height and 100-grain weight is expected to increase the fat content of soybean intercropping.