Previous Articles     Next Articles

Influence of incorporation of green manure, wheat straw and chemical fertilizer on rice growth and fertility of purple clay\|based paddy soil#br#

  

  1. (1 Department of Agricultural Ecological Environment, Jiaxing Academy of Agricultural Science, Jiaxing 314016, China; 2 College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001,China)
  • Online:2015-10-25 Published:2015-10-20

Abstract:  A field experiment was conducted to study the effect of incorporation of Astragalus sinicus, wheat straw and chemical fertilizer on rice yield components, characteristics of nitrogen (N) utilization and fertility of purple clay\|based paddy soil. It was shown that incorporation of Astragalus sinicus and/or wheat straw with chemical fertilizer increased rice yield by 132%-181% than that with chemical fertilizer only. Incorporation of chemical fertilizer and Astragalus sinicus significantly increased spike number per unit area, while incorporation of chemical fertilizer and wheat straw increased grain numbers. With green manure returning, the dry matter accumulation and N accumulation of rice at maturity stage increased by 125%-171% and 100%-128%, respectively, and the physiological N\|use efficiency of biomass production and grain was improved. Besides, the soil fertility, including soil organic matter, total N, available phosphorus (P) and potassium (K) was improved. The content of soil available K and organic matter increased by 97%-121% and 78%-156%, respectively, under green manure returning compared with that with chemical fertilizer, respectively, only. With wheat straw returning, the increase of soil available K and organic matter content was the highest.

Key words:  rice, green manure, wheat straw, purple clay, soil fertility