| Experimental research on factors affecting soil water content reasonable sampling number ——Take Yantai apple orchard as an example |
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| DOI：10.7606/j.issn.1000-7601.2007.04.22 |
| Key Words: coefficient of variation reasonable sampling number affecting factors orchard |
| Author Name | Affiliation | | XIE Heng-xing | Geography and Resources Management Department, Ludong University, Yantai 264025 | | ZHANG Zhen-hua | Geography and Resources Management Department, Ludong University, Yantai 264025
The Key Laboratory of Agricultural Soil and Water Engineering, Northwest A & F University, Yangling, Shaanxi 712100, China | | LIU Ji-long | Geography and Resources Management Department, Ludong University, Yantai 264025 | | CAI Huan-jie | The Key Laboratory of Agricultural Soil and Water Engineering, Northwest A & F University, Yangling, Shaanxi 712100, China | | ZHANG Xiao-jie | Geography and Resources Management Department, Ludong University, Yantai 264025 |
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| Abstract: |
| Based on grid sampling method, 4 soil water content samplings were conducted using TRIME system from April to August, 2005 in apple orchard of Yantai Academy of Agricultural Sciences, and affecting factors of soil water content reasonable sampling number were investigated, too. The results showed that the biggest sampling number was 4.37 to 4.42 times of the least sampling number in different sampling periods, and the biggest sampling number was 1.47 to 1.51 times of the least sampling number in different sampling methods. Rainfall made soil water content uniform, decrease the coefficient if variance, and then decrease the reasonable sampling numbers. |
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