大豆子粒棉子糖含量与生态因子的关系

棉子糖是人与动物重要的营养成分。为了研究生态因子对大豆子粒中棉子糖含量的影响，2001—2002年在河南省夏大豆主产区的3个试点，以豫豆25为材料分13期播种，将78个样本子粒的棉子糖含量与气象、土壤养分和海拔等37个生态因子进行统计分析。诸样本棉子糖含量的变异范围为0.22%~0.87%。用逐步回归法筛选出8个生态因子与大豆棉子糖含量极显著正相关，各因子对于棉子糖含量影响的最大、最小值分别为0.392%和0.156%，按各因子的贡献大小依次为鼓粒成熟期昼夜温差、分枝期日照、土壤pH值、花荚期日照、土壤锰含量、花荚期降水、分枝期降水、出苗期降水。该结果对高棉子糖含量品种选育和配套栽培技术研究有参考价值。

Effects of Ecological Factors on Raffinose Content in Soybean Seed

Raffinose is one of principal nutrients for both human beings and animals. To reveal the correlation between raffinose content in soybean seed and ecological factors, at the present experiment, soybean cultivar Yudou 25 was sown at three locations with 13 sowing dates in Henan province in 2001 and 2002, the raffinose contents in 78 soybean seed samples and 37 ecological factors including meteorological factors, soil nutrition and altitudes were investigated. The correlated factors were screened by stepwise regression, which showed significance on raffinose content. The results indicated that the raffinose content was substantially affected by the environmental conditions ranging from 0.220–0.869% among all samples, and positively correlated with eight ecological factors. The greatest difference in raffinose content caused by 8 ecological factors was 0.392%, and the smallest was 0.156%. The contribution to raffinose content in turn was the square of the diurnal temperature range at seed-filling and maturing stage, sunshine hour at branching stage, pH of soil, sunshine hour at blooming and podding stage, Mn content in soil, rainfall at blooming and podding stage, rainfall at branching stage, and rainfall at emergence stage. The results provided a reference for developing soybean cultivars with higher raffinose content.