| Effects of P fertilizer application on yield of spring wheat and characteristics of N absorption and NO-3N accumulation in soil profile |
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| DOI：10.7606/j.issn.1000-7601.2009.05.06 |
| Key Words: spring wheat yield phosphate fertilizer N absorption characteristic NO-3-N accumulation |
| Author Name | Affiliation | | ZHANG Aiping | Institute of Environment and Sustainable Development in Agriculture CAAS, Beijing 100081, China | | LIU Ruliang | Institute of Agricultural Resource and Environment Academy of Ningxia Agro-forestry Sciences, Yinchuan, Ningxia 750002, China | | LI Youhong | Institute of Agricultural Resource and Environment Academy of Ningxia Agro-forestry Sciences, Yinchuan, Ningxia 750002, China | | YANG Shiqi | Institute of Environment and Sustainable Development in Agriculture CAAS, Beijing 100081, China | | YANG Shujing | Institute of Environment and Sustainable Development in Agriculture CAAS, Beijing 100081, China | | YANG Zhengli | Institute of Environment and Sustainable Development in Agriculture CAAS, Beijing 100081, China |
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| Abstract: |
| A field experiment was carried out to study the effects of P fertilizer on yield of spring wheat, N fertilizer absorption characteristics and NO-3-N accumulation in Yellow River irrigation area of Ningxia.The result showed that P fertilizer application increased significantly grain yield and straw yield.The yield of treatment P120 was higher than that of other treatments, which was 6215 kg·hm-2.The amount of N accumulation of spring wheat increased during the period from jointing to filling, but decreased by 7.7%～13.4% at ripening.Application of P fertilizer can decrease greatly soil NO-3-N content in 0～90 cm soil layer.Compared to P0 treatment, after wheat harvest NO-3-N accumulation of P60, P120 and P180 treatment in 0～150 cm soil layer decreased by 50.6, 58.5 and 62.9 kg·hm-2, respectively.Considering high spring wheat yield, efficiency of P fertilizer and low NO-3-N accumulation, the amount of fertilizer P should be controlled within 60～120 kg·hm-2. |
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