Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Plant Nutrition and Fertilizer Science》 2007-04
Add to Favorite Get Latest Update

Alleviation of organic manure on aluminum toxicity in acid red soil

Lü Huan-zhe1,3,WANG Kai-rong1,2,XIE Xiao-li1,WANG Kai-feng1(1 National Observation Station of Taoyuan Agro-ecology System,Institute of Subtropical Agriculture,CAS,Changsha 410125,China;2 Institute of Agriculture Ecological and Environmental Health,Qingdao Agricultural University,Qingdao 266109,China;3 The Graduate School of CAS,Beijing 100039,China)  
Aluminum is the most abundant metal that makes up 7% of the earth's crust and occurs in a number of different forms in the soil.If the soil pH 5 or even 5.5,as is now the case accounted for 40% of the arable lands in the world, the harmless oxides and aluminosilicates could be solubilized into toxic forms, generally referred to Al3+,which is a primary factor limiting plant growth.A possible alternative to ameliorate Al toxicity is the application of organic manure such as rice straw.A pot experiment was conducted to investigate the alleviation of straw on aluminum toxicity in acid red soil.The result revealed that adding 0.5%,1% and 1.5% organic straw carbon significantly increased soil pH value and active exchangeable aluminum;while decreased adsorbent hydroxy aluminum. Soil pH negatively correlated with soil exchangeable aluminum and adsorbent hydroxyl aluminum.with the correlation equations being y=2193.9x + 11545,R2 = 0.9798** and y=-655.34x + 9748,R2 = 0.7837** respectively.Soil exchangeable aluminum and adsorbent hydroxyl aluminum were significantly negative correlated to root length and P and K content in the ground parts.It is the main limiting factor controlling nutrients uptake.
【Fund】: 中国科学院知识创新项目(KZCX3-SW-441);; CERN野外台站研究基金项目资助
【CateGory Index】: X53
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved