摘要
研究孔源及常规施肥 (表层全面施肥 )条件下土壤水分的时空变化规律 ,同时对二种条件下水分有效性及利用效率进行分析。结果表明 ,两种施肥方式下 ,土壤水分的时空变化有其异同点 ,与常规施肥相比 ,孔源条件下土壤水分含量剖面分布更趋合理 ,显示了此项技术抗旱保墒的良好效果。在本试验所设处理中 ,孔距及孔深分别为 30 cm和 2 0 cm的处理获得了最高的水分利用率。
Time and space changing laws of soil water under hole-source and conventional fertilizer application pattern (i.e. fertilizer was applicated on the soil surface at a full-scale) were studied. We also analysed soil water availability and use efficiency of two patterns. The experiment results showed that soil water changing laws under two patterns had common and also different characteristics. Compared with conventional pattern, soil water content's distribution on soil profile was more reasonable under hole-source pattern. This showed that the hole-source pattern had good effect on resisting drought and reserving water. Within treatments of this test, the one of hole distance and depth being 30 cm and 20 cm respectively acquired the highest water use efficiency.
出处
《干旱地区农业研究》
CSCD
北大核心
2001年第2期36-41,共6页
Agricultural Research in the Arid Areas
基金
中国科学院西北水土保持研究所博士后资助项目
陕西省自然科学基金资助项目! (4 1 3 0 2 0 1 )
关键词
水分利用效率
孔源施肥
时空变化规律
剖面分布
土壤水分
water use efficiency
hole-source fertilizer application technique
time and space changing laws
distribution on soil profile
