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在甜菜良种繁育中,影响种子产量和发芽率的原因很多,而种株后期倒青则是降低种子产质量的主要原因之一。种株倒青除因后期多水和施氮肥过量外,还与中、前期土壤水份状况有密切关系。为此我站于1978—1979年进行了种株生育各期土壤水份状况与种株后期倒青关系的试验。现将试验结果报导如下。
There are many reasons that affect the yield and germination rate of seed in the breeding of sugar beet seed, and the late fall of the seedling is one of the main reasons to reduce the seed yield and quality. In addition to the late Qingliao excessive water and nitrogen fertilizer excess, but also with the early soil moisture status is closely related. To this end I stood in 1978-1979 carried out at various stages of plant growth and soil moisture status of the relationship between late Qingqing test. The test results are reported below.