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氮和磷在饲养-堆腐环中的循环率及有机肥料养分利用率

宇万太1 关焱1,2 李建东2 张璐1 马强1   

  1. 1中国科学院沈阳应用生态研究所,沈阳 110016;2沈阳农业大学,沈阳 110161
  • 收稿日期:2005-01-26 修回日期:2005-05-23 出版日期:2005-08-18

Recycling rate of N and P through a feeding-composting cycle and their recoveries in agro-ecosystems

YU Wantai 1,GUAN Yan 1,2,LI Jiandong 2,ZHANG Lu 1,MA Qiang 1   

  1. 1Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110
    016,China;2Shenyang Agricultural University,Shenyang 110161,China
  • Received:2005-01-26 Revised:2005-05-23 Online:2005-08-18

摘要:

关键词: 甲磺隆, 除草剂, 土壤, pH值, 微生物活性

Abstract: A five-year experiment indicated that the average loss rate of N and P in harve sted products through a feeding-composting cycle was about 50% and 15%,respectively.Under high yield condition,the amount of recycled N and P from 80% harvested products and through a feeding-composting cycle in farming systems was about37~51 and 8~14 kg·hm-2,equivalent to 25%~34% of N and 32%~56% of P from chemical fertilizers applied each year to the systems.The apparent recoveries of N and P in organic manure increased with the prolongation of fertilization,indicating a synergetic residual effect existed,and was 61% and 39% in average in the five-year experiment.The use of nutrients recycled in the farming systems could not only improve soil fertility,but also increase the recoveries of nutrients and reduce the use of chemical fertilizers.

Key words: Metsulfuron-methyl, Herbicide, Soil, pH, Microbial activity