论文部分内容阅读
(一) 棉花所需的环境,是它生活所需外界条件的总和。环境的变化,自然对棉花生理功能产生强烈的影响,并决定了生育进程的快慢,对棉花产量产生显著的作用。我区常年的年平均温度16.3～17.8度,大于或等于15度的积温,20年的平均值为4381.1～5005.7度,年降雨量为1460～1750毫米,4～10月日照时数1127.7～1375.5小时,无霜期280多天;全区植棉土地60％以上是丘陵红壤,排水条件好,四月地温回升较快,平原洲地土层深厚,比较肥沃,这些都为原产热带、
(1) The environment required for cotton is the sum of the external conditions required for its life. Changes in the environment naturally have a strong effect on the physiological functions of cotton and determine the speed of the fertility process, which has a significant effect on cotton production. Annual average annual temperature of 16.3 ~ 17.8 degrees, greater than or equal to 15 degrees of accumulated temperature, 20-year average of 4381.1 ~ 5005.7 degrees, the annual rainfall of 1460 ~ 1750 mm, April to October sunshine hours 1127.7 ~ 1375.5 Hour, frost-free period more than 280 days; more than 60% of the area cotton-growing cotton is hilly red soil, drainage conditions are good, in April the ground temperature picked up quickly, the plain rich and deep soil, more fertile, these are native tropical,