共查询到10条相似文献,搜索用时 15 毫秒
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信息技术运用农业 ,使精确农业成为可能 ,精确农业是现代农业发展的新趋势 ,必将引起农业革命性的变化 相似文献
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农业专家系统的发展与精确农业 总被引:14,自引:0,他引:14
本文简要介绍了农业专家系统的构成、应用、发展现状和存在问题,并提出以专家农业系统为特征,以3S为技术核心,应用数据库技术、作物模拟模型、网络技术和多媒体技术及信息技术而构成的综合系统,才是现代农业发展的方向,也是我国农业信息化、现代化的一条新路。 相似文献
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中尺度上水稻田质量与精确农业 总被引:2,自引:1,他引:2
将GIS和地统计学方法相结合,以浙江省平湖市为例,分析了县级尺度上水稻田有机质、全氮、有效磷和速效钾的空间结构及其变异机理,并绘制各要素的空间分布图.与北方旱地土壤相比,水稻田的空间变异机理有其特殊之处,清楚其养分的变化驱动机理,可以为精确农业管理以及防治农业非点源污染提供科学的决策依据. 相似文献
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空间信息技术与土地利用管理 总被引:6,自引:0,他引:6
本文简要介绍了空间信息技术(3S技术),讨论了土地利用管理的内容和特点,分析指出空间信息技术是实现土地利用管理现代化的必然选择和强有国的技术支撑 相似文献
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Knowledge and management of soil pH, particularly soil acidity across spatially variable soils is important, although this is greatly ignored by farmers. The objective of the study was to evaluate in-field spatial variability of soil pH, and compare the efficiency of managing soil pH through site-specific method vs. uniform lime application. The study was conducted on three sites with study sites I and II (23°50' S; 29°40' E), and study sites IIl (23°59' S; 28°52' E) adjacent to each other in the semi-arid regions of the Limpopo Province, South Africa. Soil samples were taken in four replicates from geo-referenced locations on a regular grid of 30 m. Soils were analyzed for pH, and SMP buffer pH. Soil maps were produced with Geographic Information System (GIS) software, and soil pH datasets were interpolated using a geostatistical tool of inverse distance weighing (IDW). Soil pH in the fields varied from 3.93 to 7.00. An excess amount of lime as high as 30 t/ha under uniform lime application were recorded. These recommendations were in excess on field areas that needed little or no lime applications. Again, there was an under applications of lime as much as 35 t/ha for uniform liming applications. This under- and over-recommendations of lime based on average soil pH values suggests that uniform soil acidity correction and soil pH management strategy is not an appropriate strategy to be adopted in these fields with spatially variable soils. The field can be divided into lime application zones of (1) high rates of lime, (2) low rates of lime and (3) areas that requires no lime at all so that lime rates are applied per zone. A key to site-specific soil acidity correction with lime is to reach ideal soil pH for the crop in all parts of the field. 相似文献