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制定施肥计划,一般是根据各种作物在不同土壤上施肥效果的多年平均资料。实现这些计划并不能保证每年都获得最大的肥效,有些年份,某种肥料的施用显然不尽合理,有时甚至导致减产或产品品质的变劣。虽然目前农业上还没有可靠的长期天气预报,使人们有可能根据将来临的天气预先施肥,但是我们毕竟能把肥效和气象因素之间的规律性联系应用到生产上。低温对植物矿质营养和生长的影响土壤低温对作物初期发育的影响最大,在播种——出苗期,土壤温度和其它条件主要和水份一起给种
The development of fertilization programs is generally based on multi-year average data on the effectiveness of fertilizing various crops on different soils. Achieving these plans does not guarantee maximum fertilizer efficiency every year. In some years, the application of certain fertilizers has obviously not been rationalized, sometimes resulting in reduced production or worse product quality. Although there is currently no reliable long-term weather forecast in agriculture that makes it possible to pre-fertilize according to the weather to come, we can, after all, apply the regular linkages between fertilizer and meteorological factors to production. The effect of low temperature on plant mineral nutrition and growth The soil low temperature has the greatest impact on the early development of the crop. During sowing-emergence stage, the soil temperature and other conditions are mainly fed with water