网格数学方法在土壤水分运动的应用研究

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• 英文论文题名：The Application of Grid Math Operation Method on Soil Moisture Movement
• 论文作者：刘丽媛 ; 李亚兵 ; 韩迎春 ; 王占彪 ; 支晓宇 ; 王国平 ; 冯璐 ; 杨北方 ; 范正义 ; 雷亚平 ; 杜文丽 ; 邢芳芳
• 英文论文作者：Liu Liyuan ; Li Yabing ; Han Yingchun ; Wang Zhanbiao ; Zhi Xiaoyu ; Wang Guoping ; Feng Lu ; Yang Beifang ; Fan Zhengyi ; Lei Yaping ; Du Wenli ; Xing Fangfang ; Institute of Cotton Research ; Chinese Academy of Agricultural Sciences/State Key Laboratory of Cotton Biology
• 年：2017
• 作者机构：中国农业科学院棉花研究所/棉花生物学国家重点实验室;
• 论文关键词：土壤水分 ; 土壤剖面 ; 地统计学方法 ; 空间异质性 ; 梯形法则
• 英文论文关键词：soil water ; soil profile ; geostatistical approach ; spatial heterogeneity ; trapezoidal rule
• 会议召开时间：2017-08-07
• 会议录名称：中国农学会棉花分会2017年年会暨第九次会员代表大会论文汇编
• 语种：中文
• 分类号：S152.7;S562
• 学会代码：MHXB
• 会议名称：中国农学会棉花分会2017年年会暨第九次会员代表大会
• 会议地点：中国河南郑州
• 主办单位：中国农学会棉花分会
• 学会名称：《棉花学报》编辑部
• 页数：1
• 文件大小：60k
• 原文格式：O
• 会议级别：全国

摘要

精确定量田间土壤水分在土壤剖面的时空变化对变量灌溉和施肥具有重要意义。利用空间统计学的网格取样方法,在土壤剖面每间隔20 cm自动监测并记录棉田土壤水分,研究了不同点、不同剖面以及不同层次的土壤水分的时空变化。研究结果如下:不同点上土壤水分的时空变化程度随深度增加不断减少,并且不同点上水分的时空变化具有明显的空间异质;不同土壤剖面的土壤水分的时空变化在土壤非灌溉和灌溉期分别受棉行和滴灌位置的影响,2个时期在水平方向20 cm的时空变化程度均比70 cm处剧烈。然而灌溉期垂直方向40 cm处变化程度比70 cm处大,而非灌溉期垂直方向40 cm处变化程度比70 cm处小;不同层次的土壤水分的时空变化差异大,用梯形法则可以精确定量每一层次水分的变化量。本研究结果有助于指导灌溉、施肥和其他农业经营的精确管理。
The precise quantification of water movement of field soil profiles is important for variable-rate irrigation and fertilization.In this paper,using the grid sampling method of spatial statistics,soil moisture of the cotton field was monitored and recorded automatically every 20 cm across a regular soil profile,and the temporal and spatial variation of soil moisture at different points,different profiles and different levels was studied.The result showed that the variation of temporal and spatial of the soil moisture decreased with the increase of soil depth at different points,and apparent spatial heterogeneity was observed under different soil conditions through a semivariogram analysis.The variation of soil moisture at different soil profiles were affected by the cotton plants and drip lines at non-irrigation period and irrigation period,respectively.The level of the change at 20 cm were more than 70 cm at the horizontal direction at the two period,however at the the degree of change at 40 cm at the irrigation period were more than 70 cm at the vertical direction,while the contrary results are shown at the non-irrigation period.Furthermore,the variation of soil moisture at different layers are also obvious and the accurate volume of water movement was calculated using the trapezoidal rule.Our results may contribute to guidelines for the precise management of irrigation,fertilization and other agricultural operations.

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