中国春播大豆熟期组地理分布的研究

根据美国０００～Ⅹ熟期组标准品种与我国各地代表品种在南京的表现，以国际通用标准将我国大豆划分为相应的０００～Ⅸ熟期组，其中春豆归属０００～Ⅴ熟期组。并研究了我国春豆熟期组的地理分布概貌及相对于美国大豆熟期组地理分布的特点

Geographical distribution of the maturity groups of spring sowing soybeans from China

Based on a comparison with the geographical distribution of the maturity groups of soybeans in America, the geographical distribution of the maturity groups of soybeans from China classified by using international standard were revealed, showing that the maturity groups of soybeans from China were distributed, not only parallel but also vertically, and that the same maturity group covered large range. The geographical distribution of each maturity group of soybeans was analyses for chief distribution regions. The knowledge of the geographical distribution of the maturity groups of soybeans from China helped to research exchanges among different ecoregions in China and among different countries in the world.