摘要
研究结果表明，江苏扬州地区棉株根系生长的高峰期在6月20日～7月20日之间，施肥水平越高，根系生长越快；占总量80％以上的棉花根系及其生理活性主要分布在0～15cm土层；提高棉田施肥水平，有利于提高棉花根系生长量及根系生理活性。生产中应适当提高施肥水平，并应施在5～10cm的土层中。棉花根系生理活性有一定的变化规律，在初花期都有一个减弱的趋势，因此应在盛蕾初花期提前施用花铃肥，并在后期补施一次长铃肥。
This experiment was designed to study the growth and physiological activitiesof cotton roots at different fertilizer levels. The results showed that the 0~15 cm cultivatedlayer is the main distribution layer of cotton root system and the main layer of roots withphysiological activities,the amount and physiological activities of cotton roots in this layerwill be upped with the increase of fertilizer levels. All roots' physiological activities havetheir specific change rules,and the most will be a little down soon after flowering,fertilizershould be applied at this stage.
出处
《上海农业学报》
CSCD
1998年第2期56-60,共5页
Acta Agriculturae Shanghai
关键词
根系
生理活性
棉花
施肥
Cotton
Root system
Physiological activity
