论文部分内容阅读
棉花适时早播是争取苗全、苗壮、促苗早发的重要措施。但在棉花播种期间温度的高低、回暖早晚、回暖快慢、冷空气强度等因素,在不同年份常常差异很大,致使棉花播期很难掌握适时。过早,地温低,种子吸水膨胀后,易被病菌侵入,烂种烂芽;过晚,虽然温度高、出苗快,但苗嫩脚高,生育期推迟,霜前花减少,降低了产量和品质。在保证适宜墒情的条件下,决定棉花播期的主要条件是温度,掌握好温度指标是做到适时播种、保证全苗、增加产量、改善品质的重要环节。
Cotton timely sowing is to fight the whole seedlings, Miao Zhuang, an important measure to promote early seedlings. However, during the sowing of cotton, the temperature, the warmer, the warmer, the cool air strength and other factors often vary greatly in different years, which makes it difficult to grasp the cotton sowing timely. Premature, low ground temperature, the seeds of water swelling, easily invaded by germs, rotten rotten bud; too late, although the temperature is high, the emergence of fast, but Miao tender feet high, postponed growth period, reduced frost before flowering, reducing the yield and quality. Under the conditions of ensuring proper moisture content, the main condition for determining the sowing date of cotton is temperature. Grasping the temperature index is an important part of timely sowing, ensuring whole seedling, increasing yield and improving quality.