论文部分内容阅读
华中棉区,虽然年雨量充沛,足够棉花生长发育所需,无需灌溉,但雨量分布不匀,如4—6月雨季的降雨量约占全生长期雨量的60%以上,而紧接雨后的7月,每年有不同程度的伏旱,严重抑制棉株生育,增加蕾铃脱落,所以此期进行灌溉,是多坐早熟质优的伏桃,增加产量的重要措施。秋旱也常发生,使铃
Huazhong cotton area, although the annual rainfall is sufficient for cotton growth and development required, without irrigation, but the uneven distribution of rainfall, such as the April-June rainy season rainfall accounts for about 60% of the full-season rainfall, and immediately after the rain In July, there are different degrees of drought each year, which seriously dampen the cotton plant growth and increase the shedding of the buds. Therefore, irrigating during this period is an important measure to increase the yield of early maturing Vatu. Autumn drought often occurs, so bell