摘要
利用Logistic方程对2个早熟棉品种(中36、中50)和2个中熟品种(中41、鲁28)的单株干物质积累、N、P2O5、K2O吸收动态进行模拟研究,结果表明,早熟品种与中熟品种吸收积累养分的高峰期均在开花至吐絮期。2个早熟棉品种单株干物质质量、N、K2O积累快速增长持续时间短于中熟品种,P2O5积累快速增长持续时间略长于中熟品种。早熟品种在吐絮至收获阶段,干物质积累及养分吸收占全生育期的比例高于中熟品种,成熟单株对P2O5、K2O的吸收比例高于中熟品种,在肥料配比上可适度加大磷钾肥比例。
The field experiment was conducted to simulate the rule of dry matter accumulation,N,P2O5,K2O absorption of single cotton plant of 2 earliness cultivars of upland cotton（CRI 36,CRI 50）and 2 medium maturing cultivars（CRI 41,SCRC 28）by Logistic equation.The results showed that the faster moment of dry matter accumulation,P2O5,K2O absorption of single cotton plant of 2 earliness cultivars and 2 medium maturing cultivars of upland cotton were from full-bloom stage to opening bolls stage.The rapid growth period of dry matter accumulation,N,K2O absorption of single cotton plant of 2 earliness cultivars of upland cotton were shorter than those of 2 medium maturing cultivars,but the duration of rapid growth of P2O5absorption of single cotton plant of 2 earliness cultivars of upland cotton was much longer than those of 2 medium maturing cultivars.The proportion of dry matter accumulation and nutrients absorption from term of opening bolls to harvest of 2 earliness cultivars of upland cotton were higher than those of medium maturing cultivars,the proportion of P2O5,K2O absorption during whole growth season of 2 earliness cultivars of upland cotton were higher than those of 2 medium maturing cultivars relatively.The proportion of utilization of P and K fertilization could increase moderately in cultivation of earliness cultivars of upland cotton.
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2012年第2期23-26,共4页
Soil and Fertilizer Sciences in China
基金
公益性科研院所基本科研业务专项(SJB1003)
关键词
棉花
早熟和中熟品种
基因型
干物质积累
养分吸收
upland cotton
earliness and medium maturing cultivars
genotype
dry matter accumulation
nutrient absorption
