摘要
依据农田内土壤含水量的差异性 ,有针对性地进行变量灌溉 ,既可节约用水又可提高经济效益。该变量灌溉决策支持系统由不同采样点实测量土壤含水量 ,利用土壤水分预报模型 ,可预测田块实时的土壤含水量 ,然后与作物的轻旱指标、重旱指标比较可决定是否灌溉。灌溉量可以根据耗水—产量模型 ,通过经济效益分析来决定 ,进而可生成冬小麦的灌溉处方图 ,用以指挥喷灌机的运行。系统利用GIS组件MapObjects在VC ++平台上开发 ,可以实现地块信息的查询、数据存储、管理和分析等功能。
Owing to the difference of soil water in the farm, variable rate irrigation can save water as well as raising economy benefit. This system can forecast soil water content using the forecast model of soil water, according as well as soil water content of different sampling site.Irrigation or not can be decided by comparing the current soil water content with the light drought and heavy drought index of the crop. The amount of irrigation can be decided by the analysis of economy benefit according to the model of water consumption-yield, thus the irrigation prescription can be made. This system is developed by Visual C++ and Mapobjects, can query the information of fields, manage and analyse the data.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
2004年第1期103-107,共5页
Journal of Hebei Agricultural University
基金
国家科技攻关课题 (2 0 0 2BA2 0 7B - 0 1)
国家高技术研究发展计划资助课题 (2 0 0 1AA2 4 5 0 11)
关键词
平移喷灌机
变量灌溉
决策支持系统
地理信息系统
variable rate irrigation
geographic information system
decision making for irrigation
model
prescription
