论文部分内容阅读
棉花一次播种,一次早苗全苗,是棉花增产的重要关键。在苏北滨海盐垦棉区,由于土壤盐分重,结构差,遇雨容易板结,天旱又易跑墒。同时春种时气候多变,时旱时雨,棉花的播种深度很难掌握,有时播浅些,播后如遇下雨,可以及时出苗,但如遇到天旱,种沟水分散失,要等雨才能出苗,早播而得迟苗。如1962年射阳、大丰两县100多万亩棉田由于播种较浅,播后天气干旱,直至6月初降透雨后才出苗。如果播深一点,播后遇雨,土壤板结,
Once sowing cotton, a full seedling Miao Miao, cotton is an important key to increasing production. In northern Jiangsu Coastal Saltfield cotton fields, due to heavy soil salt, poor structure, easy to knot in case of rain, drought and easy to run moisture. At the same time spring climate changeable, drought when the rain, the depth of planting of cotton is difficult to grasp, and sometimes sowing some, in case of rain after sowing, you can emerge in time, but in case of drought, seed ditch water loss, to Wait for the rain to emerge, early broadcast and later seedlings. Such as the Sheyang in 1962, Dafeng two counties more than 100 acres of cotton fields due to shallow sowing, dry weather after sowing, until early June precipitation after emergence. If sowing a bit, sowing after the rain, the soil compaction,