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http://reply.papertrans.cn/2/103/10239/10239-32.png
Submitted on: 27 June 2015.
Revised on: 22 August 2015.
Accepted on: 06 October 2015.
___________________Frontiers of Agricultural Science and Engineering
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http://reply.papertrans.cn/2/103/10239/10239-35.png
Submitted on: 07 May 2005.
Revised on: 09 June 2005.
Accepted on: 01 August 2005.
___________________Frontiers of Agricultural Science and Engineering