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关于水稻采种田的收获时期,技术指导提出应比一般食用米生产稍早。其理由是,穗上稻谷的成熟,穗上部早,且穗实良好,适于作种谷。等到穗下部的粒成熟时,适于种用的穗上部粒可能出现腹裂和穗发芽等障碍,使种谷品质下降. 然而,对上述论点的根据尚有疑问。另外,对于采种农家经济上有重要意义的种谷产量,怎样随收获时期而变化,试验例证少。最近,随着种子更新率的提高,采种田面积有逐年增加的趋势,而且90%以上的采种田已采用机
With regard to the harvesting period of paddy fields, technical guidance should be proposed earlier than that of general food rice. The reason is that ears of rice mature, early upper ear, and spike is good, suitable for planting valleys. When the grains under the ear mature, the upper panicles suitable for planting may have obstacles such as gastrulation and ear sprouting, which will degrade the seed quality. However, the basis of the above arguments is still in doubt. In addition, there are few experimental examples of how the production of seed and grain crops of economically significant importance for the collection of farm produce varies with the time of harvest. Recently, with the improvement of the seed renewal rate, the area of reclaimed farmland has been increasing year by year, and more than 90% of the reclaimed farmland has been adopted