棉花高密度种植群体结构的研究

The Structural Research of the Cotton Degree Planting Group of High Density

通过对棉花3种高密度种植模式与常规种植模式进行试验,研究不同密度棉花个体及群体营养生长、生殖生长的变化规律。结果表明:随着种植密度的增加,个体生长发育减弱,而群体的生长发育则以株距加密(26.1×104株/hm2)的模式最强,表现群体结铃数多、产量最高。在产量构成中,棉株中下部铃占总产的85%以上,而棉株内围铃占总产的90%。认为在进行棉花高密度栽培生产时,应选用株型紧凑的Ⅰ、Ⅱ类分枝型品种,中等肥力田,采用株距加密(理论株数26 1×104株/hm2)的模式种植,促进中下部多结铃,实现更加理想的产量。

The change regularity of different density cotton individual and group nutrition growth and reproduction growth based on the experience resulted by using the planting pattern of the 3 kinds of high density and conventional pattern on cotton.Show as a result: Along with the increase of planting density, individual growth weakens, and the growth of group encrypts with spacing in the rows( 261 000 plants/hm2) pattern is the most strong, expression group knot bell number is much, has highest yield.In yield forms,the medium-inferior bell of cotton make up 85% of the total yield always more, and internal surround bell of cotton make up 90% of total yield always. According that should choose the variety of the branched type of compactⅠ、Ⅱ kind of plant type, medium fertility field is planted with the pattern of the encryption of spacing in the rows(plant population was 261 000 plants/hm2). It is expected to realize more ideal output by strengthening manage and promoting knot bell more in medium—inferior.