There is the reward decrement relationship between K amounts from organic and inorganic fertilizer and yield of virus-free potato, and the reciprocal effect presents a negative value.
2
城市污泥是一种富含有机质、高氮、高磷及多种微量元素的有机肥，并含有病原微生物、寄生虫卵等。
Sewage and sludge are a kind of organic fertilizer that is rich in organic matter, nitrogen and other microelements, and it also contains pathogeny microbes and parasitic ovum etc.
3
对设施土壤中长期施有机肥与氮肥对土壤中碱解氮含量的影响进行了研究。
The influence of application of organic and nitrogen fertilizer on the content of alkali hydrolysable N in fertilities soil was studied.
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