| 长期施用有机肥对土壤及不同粒级中有机磷含量与分配的影响 |
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| 引用本文： | 徐阳春,沈其荣,茆泽圣.长期施用有机肥对土壤及不同粒级中有机磷含量与分配的影响[J].土壤学报,2003,40(4):593-598. |
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| 作者姓名： | 徐阳春 沈其荣 茆泽圣 |
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| 作者单位： | 南京农业大学资源与环境科学学院,农业部作物生长与调控重点实验室,南京,210095 |
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| 基金项目： | 国家自然科学基金重点项目(39830220)资助 |
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| 摘 要： | 通过在黄棕壤上开展的 14年田间定位试验研究稻 -麦水旱轮作下长期施用有机肥对土壤及不同粒级中有机磷的影响。结果表明 :与不施肥的对照和单施化肥相比 ,有机肥与化肥长期配合施用能显著增加土壤有机磷总量 ;就有机磷的形态而言 ,长期施肥主要增加中等活性有机磷的含量。土壤不同粒级中总有机磷的含量顺序为 :0～ 2 μm >2～ 10 μm >5 0～ 10 0 μm >10～ 5 0 μm。从分配系数上看 ,土壤有机磷各形态中以对植物有效性较高的中等活性有机磷占绝对优势 ,对植物有效性最高的活性有机磷仅占 3 %左右。长期施用有机肥后使分配在活性、中等活性组分中有机磷的比例增加 ,而稳定性有机磷中的比例下降。
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| 关 键 词： | 长期施肥 有机磷组分 土壤粒级 |
| 收稿时间： | 1/7/2002 12:00:00 AM |
| 修稿时间： | 2002年1月7日 |
INFLUENCES OF LONG-TERM FERTILIZATION ON THE CONTENTS AND DISTRIBUTIONS OF FORMS OF ORGANIC P IN SOIL AND SOIL PARTICLE SIZES |
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| Xu Yang-chun,Shen Qi-rong and Mao Ze-sheng.INFLUENCES OF LONG-TERM FERTILIZATION ON THE CONTENTS AND DISTRIBUTIONS OF FORMS OF ORGANIC P IN SOIL AND SOIL PARTICLE SIZES[J].Acta Pedologica Sinica,2003,40(4):593-598. |
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| Authors: | Xu Yang-chun Shen Qi-rong and Mao Ze-sheng |
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| Institution: | College of Resources and Environmental Sciences, Nanjing Agri. Univ., Key Lab. of Crop Growth Regulation, Ministry of Agri., Nanjing 210095, China;College of Resources and Environmental Sciences, Nanjing Agri. Univ., Key Lab. of Crop Growth Regulation, Ministry of Agri., Nanjing 210095, China;College of Resources and Environmental Sciences, Nanjing Agri. Univ., Key Lab. of Crop Growth Regulation, Ministry of Agri., Nanjing 210095, China |
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| Abstract: | The effects of manure application on the contents and distributions of fractions of organic P in soil and soil particle sizes were investigated in a field experiment,which consisted five treatments of control(no fertilizers),chemical fertilizers,chemical fertilizers plus straw,chemical fertilizers plus green manure, and chemical fertilizers plus pig manure and had continued for 14 years at the farm of Jurong Agricultural Science Institute.The crop rotation of the experiment was summer rice(Oryza Sativa L.) and winter wheat(Triticum aestivum).The results showed that compared with the treatments of control or single application of chemical fertilizers,the combined application of organic manures with chemical fertilizers could significantly increase soil organic P.The contents of soil organic P in different soil particle size fractions were in the following order:0~2 m>2~10 m>50~100 m>10~50 m.Long-term fertilization mainly increased the contents of moderately labile organic P which was a little bit available to plant absorption and accounted for a largest percentage of soil organic P no matter in soil itself or in different soil fractions.The labile organic P was also increased in long-term fertilization but its contribution to plant P nutrition was small since it accounted for only 3% of total organic P in soils.Furthermore,long-term fertilization could decrease the percentage of highly resistant organic P showing that fertilization could also activate the nat ive soil P to improve plant P nutrition. |
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| Keywords: | Long-term fertilization Fraction of organic P So il particle size |
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