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通过对3种密度的大豆群体进行研究,探讨了不同密度下的大豆茎部几种主要性状的生长发育规律。试验结果表明:不同密度大豆群体不同生育时期株高与各茎节高呈S形曲线变化趋势,各茎节的长度、茎粗及茎重呈现“降升降”的趋势,单株茎粗与茎节重变化呈“先升后降”的趋势,单节茎粗与单节茎重随着群体密度的降低而增加。
Through the study on three density soybean populations, the growth and development of several main characters of soybean stem at different densities were discussed. The results showed that the S-curve curves of plant height at different growth stages of soybean in different growth stages showed a trend of “decreasing and decreasing” with the length, stem diameter and stem weight of all the stems. The change of weight in section showed the trend of “first rising and then decreasing”. The stem diameter of single branch and the weight of single branch increased with the decrease of population density.