摘要
为探讨新疆棉田地下滴灌方式下土壤速效磷空间分布的规律,在棉花不同生育期采用0.5 mol/LNaHCO3浸提-钼蓝比色法,从水平方向和垂直方向上测定棉田土壤速效磷(Olsen-P)。研究分析后认为:垂直方向上,在棉花各生育期土壤速效磷含量的变化呈随着土层深度的增加而减小的趋势;随生育进程的推进,棉田各土层土壤速效磷呈逐渐下降的变化趋势;水平方向上,棉田各土层土壤速效磷的变化呈随着与滴灌带距离的增大而缓慢增加的趋势;随棉花生育进程的推进,水平方向土壤速效磷变化为逐渐减少的趋势。
To explore the spatial distribution rule of soil available phosphorus in subsurface drip irrigation of Xinjiang cotton field, the soil available phosphorus was measured by using 0.5 mol/L NaHC03 extraction - molybdenum blue eolorimetric method from the horizontal and vertical directions in different growth stages of cotton . The results are as follows ： with the increasing of soil depth, the change of the soil available phosphorus decreases in the vertical direction in each breeding time of the cotton ; with the advance process of the cotton growing period, the change of the soil available phosphorus presents the gentle reducing tendency in different soil layer ; tile change of the soil available phosphorus is slowly increasing trend, with the increasing of the distance to drip irrigation belt in the horizontal direction; the change of the soil available phosphorus gradually decreases, with the advance process of the cotton growing period in the horizontal direction.
出处
《新疆农业科学》
CAS
CSCD
2008年第3期428-432,共5页
Xinjiang Agricultural Sciences
基金
塔里木大学校长基金项目(TDZKZD5005)
关键词
棉田
地下滴灌
速效磷
cotton field
subsurface drip irrigation
available phosphorus
