上海地区微量元素肥料应用区划计算机辅助设计

CAD FOR REGIONAL PLANNING OF MICROELEMENT FERTILIZER APPLICATION IN SHANGHAI SUBURBS

微量元素肥料应用区划研究,系上海市农业委员会下达的科研任务。根据11年田间和盆栽试验得出的微肥效应,将全市农业耕地中硼、锌、钼、锰4种微量元素含量、分布及大田作物的增产效应,综合土壤中pH值、有机质、N、P、K施用水平及土壤质地,运用微型计算机建立的数据管理系统进行相关分析,并建立多元非线性统计模型,选择其最佳模型制定区划分级标准,由计算机进行分级和归类,并据此确定全市各种微量元素肥料的应用区划。

This research on regional planning of microelement fertlizer application in Shanghai suburbs was assigned by Shanghai Municipal Agricultural Committee. According to the microelement fertilizers' effect observed in field experiments and pot culture tests over 11 years, correlation analyses were made by utilizing the microcomputer-established data management system and multivariate nonlinear statistical models wereset up with the following parameters: content and distribution of four microelements-B, Zn, Mn, Mo in all Shanghai suburban cultibvated lands, effect of microelement fertilizers on yield increase of field crops, soil pH, soil texture and contents of organic matter and N, P, K in soil. Then, the optimum model was chosen to fix the grading standard for regional planning, the grading operation and classification were performed by microcomputer. Finaly, according to the results of grading and classification by microcomputer, the regional planning of microelement fertilizer application in Shanghai suburbs was established.