Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Acta Agriculturae Boreali-Occidentalis Sinica》 2014-04
Add to Favorite Get Latest Update

Spatial Pattern and Sampling Method for Microsclerotia of Verticillium dahliae in Soil of Cotton Field

SHANG Wenjing;WEI Feng;FENG Xiaojun;ZHU Heqin;YANG Jiarong;HU Xiaoping;State Key Laboratory of Crop Stress Biology in Arid Areas,College of Plant Protection,Northwest A&F University;Institute of Cotton,Chinese Agriculture Academy Sciences;The Station of Plant Protection Shaanxi;  
Verticillium dahliae can infect more than 660plant species,which results in cotton Verticillium wilt characterized as serious damage and difficult to control.Microsclerotia are the main survival structure of V.dahliae and primarily inoculum of Verticillium wilt in soil.It will be useful for predicting the disease level based on microsclerotium quantity from the spatial pattern and sampling method.The investigation in Yangling showed that spatial pattern of the microsclerotium was aggregated or uniform distribution,and changing with its mean density at 0-20cm soil layers.The theoretical model for sampling microsclerotia in soil was n=1.467 9(t/D)2 m-1.260 4.If the economic threshold was given as 0.5microsclerotia per gram soil,the Iwao's sequential sampling model was achieved with the maximum sampling size of 35plots.Comparing different fixed-sample-size techniques,we concluded that the bidiagonal technique is preferable,and the sampling size changes with the density of microsclerotia in soil.
【Fund】: 国家自然科学基金(31371888);; 棉花生物学国家重点实验室开放课题基金(CB2013A20);; 高等学校学科创新引智计划(B07049)
【CateGory Index】: S435.62
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