基于放牧时空轨迹数据的牧群采食量分布模型  

Feed intake distribution model for herd based on grazing spatio-temporal trajectory data

作　　者：汪传建[1,2,3] 王伟强[1,2,3] 鲁为华[4] 文春雷 尹小君[1,2,3] 赵庆展[1,2,3] 

机构地区：[1]石河子大学信息科学与技术学院,石河子832000 [2]兵团空间信息工程技术研究中心,石河子832000 [3]兵团空间信息工程实验室,石河子832000 [4]石河子大学动物科技学院,石河子832003

出　　处：《农业工程学报》2016年第13期125-130,共6页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金(41461088;31560659)

摘　　要：为了快速大范围地掌握牧群采食量分布信息,提出一种牧群采食量分布模型。根据放牧过程的时空连续性,借助放牧轨迹采用缓冲区与网格分析方法获得放牧分布,结合模拟采食法,通过轨迹点间的时间间隔计算采食时间,并将其累加得到日采食时间,进而依据采食时间与日采食时间比例将牧群日采食总量分配给每个局部放牧分布,并采用网格叠加方法得到给定时空范围的采食量分布。以2015年为实例,对研究区采食量分布进行监测:模型结果与实际放牧情况一致性较好,准确度可达86.2%以上。结果表明该模型可快速大范围地提取牧群采食量分布信息,并能为相关部门对牧群采食量分布信息的监测提供计算依据和方法。Overgrazing is one of the main reasons of grassland degradation. How to monitor the temporal and spatial distribution of feed intake rapidly and effectively is very important for formulating scientific and rational grazing plan and protecting the grassland. Due to Xinjiang＇s remote geographic location and vast area, traditional ways of collecting data about feed intake such as recording the data manually is not efficient. With the rapid development of global navigation satellite system, the grazing trajectory data of heads can be collected conveniently. Grazing trajectory records the information of feeding process such as time, position and velocity. In this paper, a temporal and spatial distribution model of feed intake based on trajectory data of grazing is proposed. The establishment of the proposed model consists of 2 steps： constructing the distribution of feed intake with the minimum temporal and spatial granularity, which is used to calculate the feeding intake distribution of the herds in one day, and generating the distribution of feed intake with the multiple temporal and spatial granularities, which is used to describe the feeding intake distribution of the herds in a bigger temporal and spatial granularity. To obtain the distribution of feed intake with the minimum temporal and spatial granularity, the grazing region is computed by building buffer zone using grazing trajectory data. Then the theoretical feeding intake of herds is allocated upon the grazing region evenly to acquire the temporal and spatial distribution model of feed intake. To generate the distribution of feed intake with the multiple temporal and spatial granularities, the target grassland is divided into grids and the distribution of every feed intake with the minimum temporal and spatial granularity is mapped into the grids, and then the multiple temporal and spatial granularities are computed by overlapping the feeding intake grids. The model is subsequently utilized to compute the feed intake distribution. We collected grazing

关 键 词：轨迹 模型 监测 网格叠加 放牧 采食量 缓冲区 

分 类 号：S127[农业科学—农业基础科学] TP79[自动化与计算机技术—检测技术与自动化装置]