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一个大豆新品种经过多年的种植,由于品种种类繁多,自然条件的变化及栽培管理过程等某些环节的影响,使其丧失原有的优良性状而变劣,导致大豆品种纯度降低,品质下降,生活力衰退和增产能力下降,失去了原来的形态特征和优良种性。在生产上表现为植株参差不齐,生育期不一致,抗逆性和适应性减退,经济性状变劣,严重影
After years of planting a new soybean variety, due to a variety of varieties, changes in natural conditions and cultivation and management processes and some other aspects of the impact, so that it lost the original fine traits and worse, resulting in reduced purity and lower quality soybean varieties, The decline of vitality and the increase of production capacity have lost their original morphological characteristics and superior species. In the production of the plant showed uneven, inconsistent growth period, resistance and adaptability decline, economic traits worse, severe shadow