论文部分内容阅读
从1979年开始,我们针对上海郊区氮肥用量大、成本高、产量不稳、经济效益低的情况,应用电子计算机编制青紫泥类型土壤早稻的合理施肥量方案。先后对这个地区大量的土壤氮素供应量、氮肥施用量和产量关系、氮肥的增产效益、不同茬口对水稻产量影响等一系列问题进行了研究。通过这些研究,建立了相应的数学模式和一些理论和经验的参数。用Basic语言编制计算机程序贮存在计算机内。1982年开始,进行了给电子计算机输入包括品种、茬口和土壤测定指标等10个信息资料编制合理施肥量方案的田间试验。
Starting from 1979, we applied a computerized program of rational fertilization for early-type soils of purple-type soils based on the large amount of nitrogen fertilizer in the suburbs of Shanghai, high cost, unstable production and low economic returns. A series of issues such as the large amount of soil nitrogen supply, the relationship between the amount of nitrogen fertilizer and yield, the yield increase of nitrogen fertilizer and the impact of different stubbles on the yield of rice were studied in this area. Through these studies, the corresponding mathematical models and some theoretical and empirical parameters have been established. Using Basic language programming computer program stored in the computer. Beginning in 1982, a field experiment was conducted in which a computer program was put in place to input 10 information materials including variety, stubble and soil determination index into a reasonable amount of fertilizer.