谢恒星,张振华,刘继龙,蔡焕杰,张晓杰.土壤含水量合理取样数目影响因素的试验研究——以烟台苹果园为例[J].干旱地区农业研究,2007,(4):114~118 |
土壤含水量合理取样数目影响因素的试验研究——以烟台苹果园为例 |
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 |
中文关键词: 变异系数 取样数目 影响因素 果园 |
英文关键词:coefficient of variation reasonable sampling number affecting factors orchard |
基金项目:国家高技术研究发展计划项目(2002AA2Z4031);国家自然科学基金(50609022) |
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中文摘要: |
2005年4月至8月期间利用TRIME系统采用网格化取点方式,对烟台市农科院苹果园162个格点土壤含水量进行了4次取样,对土壤含水量合理取样数目的影响因素进行了试验研究。结果表明,不同取样时间的最大合理取样数目是最小合理取样数目的4.37~4.42倍,不同样点位置(采样方式)的最大合理取样数目是最小合理取样数目的1.47~1.51倍,对于本苹果园,土壤含水量分布状况是影响其合理取样数目的最主要因素。降雨有使土壤含水量分布均匀,降低变异系数,从而减少合理取样数目的作用。 |
英文摘要: |
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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