摘要
通过田间小区试验和微区筒15N示踪试验对垄作表层施肥（垄面下l～2cm土层处施肥）、垄作中层施肥（垄面下25cm土层处施肥）、垄作底层施肥（垄面下45cm土层处施肥）和平作表层施肥（常规耕作，1～2cm土层处施肥）的小麦生长发育及氮肥肥效的变化开展了研究。结果表明，在垄作条件下，施肥越深，氮肥利用率越高，即垄作表施（14.52％）＜垄作中施（16.53％）＜垄作底施（20.56％）;与其它处理相比，平作表施（23.78％）的氮肥利用率值最大。地上部生物量及叶面积系数在小麦各生育期通常是平作表施和垄作中施＞垄作表施和垄作底施。
A experiment on the effect of nitrogen fertilizer on growth of wheat under ridge culture(20cm ridge height) condition with different depth fertilization 11～2cm. 25cm and 45cm under ridge) and soil surface fertilization without ridge (normal culture) as control were conducted in field. Tracer N was used. The resulte showed that the deeper fertilization. the higher effect of N fertilizer in ridge culture treatments. The recovery rate which N fertilizer applied in 1～2cm layer under ridge was 14.52%, In the 25cm was 16. 53% and in the 45cm was 20. 56%. The recovery rate of N fethilizer wa8 23. 78% in surface fertilization without ridge.Leaf area index and biomass of shoot and root of wheat at different growth stuge of wheat while the N applied in 5cm under ridge or in surface non-ridge werc better than other treatinents. Therefore. under ridge culture condition. the N fertilizer application with a suitable depth of soil should be considered.
出处
《植物营养与肥料学报》
CAS
CSCD
1997年第3期255-261,共7页
Journal of Plant Nutrition and Fertilizers
基金
国家自然科学基金
关键词
小麦
垄作
施肥位置
氮肥
肥效
Wheat Ridge culture Place of fertilization
