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应用生态学报 ›› 2002, Vol. ›› Issue (12): 1571-1574.

• 研究论文 • 上一篇    下一篇

下辽河平原农业生态系统不同施肥制度的土壤养分收支

宇万太, 张璐, 殷秀岩, 马强, 沈善敏   

  1. 中国科学院沈阳应用生态研究所, 沈阳, 110016
  • 收稿日期:2002-08-20 修回日期:2002-10-12
  • 通讯作者: 宇万太,男,1964年5月出生,硕士,研究员,长期从事土壤肥力和农业生态系统物质循环方面的研究,发表论文30余篇.
  • 基金资助:
    中国科学院知识创新工程重大项目(KZCX24134);中国科学院“九·五”科技攻关重点资助项目(KZ952JI214)

Effect of different fertilization system on soil nutrient budget

YU Wantai, ZHANG Lu, YIN Xiuyan, MA Qiang, SHEN Shanmin   

  1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016
  • Received:2002-08-20 Revised:2002-10-12

摘要: 本试验是在潮棕壤上进行了10年的定位试验.研究了在养分循环再利用的基础上采取不同施肥制度下作物养分移出量,并结合施肥量计算出土壤中N、P、K养分收支.结果表明,在保持农业系统养分循环再利用的基础上,根据养分供给力设计化肥施用量,不仅可实现作物高产,而且可平衡土壤养分收支,避免土壤中肥料养分过剩(主要是N)进入环境.并揭示了我国在20世纪70年代以前大面积农田土壤缺P和80年代农田土壤大面积缺K的原因.

关键词: 养分循环利用, 长期田间试验, 土壤养分收支, 树木年轮学, 生长历史, 古树, 树龄

Abstract: Along term experiment was carried out on a damp palm soil about ten years under the condition of nutrient recycling and reutilization. The quantity of crop nutrients transferred from the system,and the nutrient budget of N,Pand Kin soil were studied. The results of a ten-year field experiment indicated that the use of nutrients recycled in the farming systems with appropriate amount of fertilizers applied according to the soil nutrient supplying ability could not only produce high crop yield, but also balance the soil nutrient budget,so that,there were no significant surplus of nutrients (mainly inorganic nitrogen) which might emit or leach out of soil into environment.

Key words: Nutrient recycling and reutilization, Long term field experiment, Soil nutrient budget, tree age, old tree, growth history, dendrochronology

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