The artificial neural network is trained through adoption of BP algorithm. The map relationship between wheat yield and dosage of fertilizer is approached, and the soil fertilizer model is established. 采用BP算法训练网络,对小麦产量和施肥用量之间的映射关系进行了函数逼近,建立了土壤施肥神经网络模型。
Through researches and processing, the following products can be made from tung cake: cheese casein, animal feed, additive in foodstuffs, artificial petroleum, stuffing of bakelite plastics and fertilizer. 经加工桐饼能制成下列产品:植物性干酩素、动物饲料、食品添加剂,人造石油、电木塑料的填充剂及肥料等。
In both artificial restoration area and nature succession area, soil pH value and the content of organic matter and N increase but the content of K and P are too low and need to apply more fertilizer. 植被恢复过程中人工恢复模式和外套自然演替的土壤pH值均趋向增加,有机质含量和氮素含量均呈现增加趋势,但是土壤钾素含量与磷素含量都偏低,需要通过施肥加以缓解。
For raising the fruit-setting rate in first fruiting period of Dashi early plum, artificial pollination, girdling, spraying plant growth regulators and applying microelement fertilizer were conducted in blooming stage. 为提高大石早生李初果期坐果率,于盛花期进行人工授粉、环剥和环割、喷施激素和微肥试验。
Based on the method of artificial neural network, the soil fertilizer model is researched. 基于神经网络理论,对土壤施肥模型进行了研究。
Pollution of agrochemicals to environment and its countermeasures There are two artificial factors that effect on soil acidification, one is acid precipitation caused by air pollution, another is abuse of chemical fertilizer. 其中,有两方面的人为因素对土壤酸化产生较大影响,一是大气污染导致酸沉降增加诱发土壤酸化,另一个方面是农业生产过程中的不当措施引起土壤酸化。
By contrast, organic farming could effectively conserve biodiversity and maintain stability of ecosystem by absolute prohibition of pesticide and artificial fertilizer. 而有机农业生产体系由于严格禁止使用化肥、杀虫剂,能够有效保护生物多样性,维持生态系统的稳定性。
Using BP artificial neural network predict fertilizer amount. 采用BP人工神经网络对施肥量进行预测。
Great tendency of agricultural sustainable development, putting forward Precision Agriculture concept and viewpoint in save time, high efficiency and economy, require reasonably scientific application of mixture of herbicides and other agricultural chemicals including artificial fertilizer, minor element fertilizer and so on. 农业可持续发展的大趋势及精确农业概念的提出和从省时、高效、经济的观点,要求农药和其他农用化学品包括化肥、微量元素肥料等尽可能科学合理地混合使用。