论文部分内容阅读
我县棉田共24.8万亩,其中旱地占80％以上。多年实践证明,影响棉花播种和全苗的主要因素是春旱、低温和晚霜。因此,掌握当年地温和墒情,确定适宜播种期,是抓全苗、保丰收的关键。一、温度与播期棉花播种适期是指5厘米地温适宜,播后稳定上升,出苗后避过晚霜,从播种到出苗的一个适温范围。我县春季温度回升大体有三种情况:一是正
A total of 248,000 acres of cotton fields in our county, of which dry land accounts for more than 80%. Years of practice have proved that the main factors that affect cotton sowing and whole seedling are spring drought, low temperature and night frost. Therefore, grasping the warmth of the year to determine the appropriate sowing period, is to grasp the whole seedlings, Paul harvest the key. First, the temperature and sowing Cotton sowing period refers to 5 cm suitable for ground temperature, stable rise after sowing, avoiding late frost after emergence, from sowing to emergence of a suitable temperature range. My county spring temperature rise there are three general conditions: First, positive