Full-Text Search:
Home|About CNKI|User Service|中文
Add to Favorite Get Latest Update

A division harnesses pattern of steep slope field and the evaluations of its profits in Qian-Dian connected area

WANG Zhen-hong(College of Life Science,Guizhou University,Guizhou Guiyang 550025,China)  
A pattern of slope field division harness was put forward based on the analysis of the characteristics of slope field and its profits were evaluated through the experiments.The results indicated that aboveground standing crops of(Vicia villosa) and Aremisia apiacea were 31845.75kg·hm~(-2)and 23968.50kg·hm~(-2),which could supply 20000kg of green manure with nitrogen 756kg,phosphorus 130.57kg and potassium 970.3 kg at least for the economic zone and(3000m~3 of) the water for the irrigation of economic zone.The yields of per hectare of(cereals) food in the economic zone went up to 4459.28kg·hm~(-2),20%more than the yields of slope field before.When soy bean and the wheat in economic zone were harvested,soil layer from 0 to 20cm depth contained nitrogen 2.45t·hm~(-2),2.49t·hm~(-2),phosphorus(3.51t·hm~(-2),)3.48 t·hm~(-2),potassium 15.46t·hm~(-2),15.33t·hm~(-2).The soy bean and the wheat sucked separately up (nitrogen) 187kg,92kg;phosphorus 25kg,8kg;potassium 119kg,65kg from earth in entirely growth stage.The ecological zone would supplied respectively 167kg, 85kg nitrogen;31kg,7kg phosphorus,131kg,57kg potassium at least for the economic zone grown the soy bean and wheat to maintain nourishment equilibrium of soil.Infiltration ratio of runoffs presented the power function relationship with the alternation of time on ecological and economic zones,but the accumulated infiltration volume of runoffs did the logarithmic function relationship with the alternation of time.
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©CNKI All Rights Reserved