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棉花是常异交作物,其异交率常因环境条件不同,而有相当大的变化。对棉种的安排利用应和自然作物不同,同一个自然地区种植的品种,应以少为宜,以免因天然杂交和机械混杂,导致劣变退化,为生产带来损失。我省常年植棉面积约110万亩左右,分布在平原、丘陵、岗地。经济条件、自然因素、栽培制度和栽培方式等都有差异。因而对棉种的生育特性也有不同要求。为了满足不同地区、不同条件对棉种的不同需要,挖掘不同地区的棉花增产潜力,应本着一县2—3个品种、一个自然地区或一个乡一个品种的原则,根据各个不同自然地区的具体情况和试验示范结果,恰当安排具有不同特点的品种。当前全省种植的棉种较杂,一个县一个乡几乎都有5—10个品种,有的棉种
Cotton is often outcrossing crops, and its outgrowth rates are often quite different due to different environmental conditions. The utilization of cotton seed should be different from that of natural crops. The cultivars planted in the same natural area should be less suitable so as to avoid the natural hybridization and mechanical mixing, resulting in the deterioration and deterioration of production and bringing losses to production. The annual cotton planting area in our province is about 110 million mu, distributed in the plains, hills, post. Economic conditions, natural factors, cultivation systems and cultivation methods are different. Thus the fertility characteristics of cotton seed also have different requirements. In order to meet the different needs of cotton seedlings in different regions and different conditions and tap the potentials of cotton yield in different regions, we should follow the principle that 2-3 varieties in one county, one natural region or one rural one breed, according to the different natural regions Specific circumstances and test demonstration results, the appropriate arrangements for different varieties of traits. At present, cotton varieties planted in the province are more complex. There are almost 5-10 varieties in one county and one township, and some cotton species