论文部分内容阅读
土壤有效磷含量是判断土壤肥力高低的一项重要指标,按照现代测土配方施肥的有效磷的6级分级标准进行比较。1979~2014年间各种类型的土壤比例有所变化,2014年较高。根据相关分析说明由于土壤有效磷的提高,降低了微量元素铁、锰、锌等以及有益元素的有效态数量。由于元素之间的拮抗作用,在磷元素丰富的土壤中,仍然过量的使用磷肥,土壤有益微生物不足会导致阳离子供应水平以及土壤肥力下降,进而影响到植物的正常生长与品质;同时,还使作物自身抗病虫、抗逆能力下降。
Soil available P content is an important indicator to judge the soil fertility level, and is compared with 6 grades of available phosphorus according to modern soil testing and fertilization. The proportions of various types of soils varied from 1979 to 2014, higher in 2014. According to the correlation analysis, the effective amount of trace elements such as iron, manganese, zinc and so on as well as beneficial elements was reduced due to the increase of soil available phosphorus. Due to the antagonism between elements, excessive phosphate fertilizer is still used in phosphorus-rich soils. Insufficient soil beneficial microbes lead to a decrease in the level of cation supply and soil fertility, which in turn affects the normal growth and quality of plants. At the same time, Crops are resistant to pests and diseases and their resilience is reduced.