论文部分内容阅读
河北省棉花专家顾问组近日对邯郸、邢台、衡水、沧州等地棉花生长情况进行了田问考察,今年棉花生长发育主要特点是:一是播期适宜。大部分棉田在4月22日—30日播种,较往年推迟3—5天,有效解决了以往播种过早的问题;二是苗齐苗壮,长势稳健。据调查,目前平均株高11.29厘米,真叶5.75片,株高和叶片数均较常年同期有所降低,发育进程有所推迟,利于减少前期阴雨烂铃和预防早衰;三是密度较为合理。据调查,平均密度每亩4434株,但存在北部个别棉田密度偏稀、南部个别地块行距偏小的问题;四是病虫害轻。今年因5月份降雨少,温
Hebei Cotton Advisory Group recently Handan, Xingtai, Hengshui, Cangzhou and other places to conduct a field survey of cotton growth, cotton growth and development this year, the main features are: First, sowing appropriate. Most of the cotton fields are sown on April 22-30, 3-5 days later than previous years, effectively solving the problems of sowing too early. Second, the seedlings grow well and grow steadily. According to the survey, the current average plant height of 11.29 cm, 5.75 true leaves, plant height and leaf number were lower than usual over the same period, the development has been postponed, which will help reduce pre-rainy weather and prevent premature aging; Third, the density is more reasonable. According to the survey, the average density of 4434 plants per acre, but there is the density of individual cotton fields in the northern part of the thinning, the southern part of the individual row spacing is too small; Fourth, pests and diseases light. This year due to less rainfall in May, Wen