稀有鹽基 的英文怎麼說
中文拼音 [xīyǒuyánjī]
稀有鹽基
英文
rare base-
Our aim is to provide reference data for the mechanism of the effects of ree on crops and the safety evaluation of re used in agriculture. 1. in soil culture experiment, re applications with appropriate dose in dry condition increased the contents of soil available n, whose no - effect value were 505mg / kg at eighth week, whereas higher levels of re had negative effects, re applications with both appropriate and higher dose in inundated condition reduced the contents of soil nh / - n and hydrolysable n. re treatment concentrations showed significant positive correlation with the contents of soil exchangeable re. and significant negative correlation with the contents of soil available p and soil ph value. there was no significant effects of re on soil exchangeable cations, but applications of re increased the contents of soil water soluble cations, especially that of ca2 * and mg2 +
兩種培養條件下，稀土處理濃度與土壤交換態稀土含量成正比，與有效磷含量、土壤ph成反比，對土壤交換態鹽基離子含量無顯著影響，但通過置換作用增加了水溶態離子，尤其是ca ~ （ 2 + ） 、 mg ~ （ 2 + ）離子的含量；第二周稀土處理增加交換態zn含量，對交換態fe有降低作用，旱培條件下增加交換態mn含量，淹水條件下對其有降低作用；第八周稀土處理均提高交換態fe 、 mn 、 zn含量，其機制主要與稀土降低土壤ph有關。
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