摘要
采自不同地区１０个土样先经盆栽黑麦草耗竭并去除根系过２ｍｍ筛作供试土样。再向土样中以摩尔比２．８：１同时加入Ｋ￣＋时，土壤的铵固定量比单加处理略有增加，新固定铵、钾摩尔比在６～１０之间。降低同时加入的：Ｋ￣＋摩尔比至１：１．４，新固定铵、钾摩尔比在１．３～２．０之间。先加钾１００ｍｇ／ｋｇ培养４８ｈ后，再加１００ｍｇ／ｋｇ续培养２ｈ，新固定铵、钾摩尔比在１～２．３之间。表明在本试验条件下，土壤有优先固定铵而少固定Ｋ￣＋的现象，无论Ｋ￣＋，同时加入还是Ｋ￣＋先加入者均如此。
Ryegrass was cultivated on ten soils collected from different parts of China to deplete nutrients.After the rcots re-moval,the soils were used in a series of experiments to study fixation of and K￣+ by solls.When K￣+was added concurrentlywith or prior to,the soils were found to fix more moles of than those of K￣+,irrespective of the mole ratios of to K￣+ that were added.
出处
《江苏农学院学报》
CSCD
1996年第2期21-23,共3页
Jiangsu Agricultural Research
基金
国家自然科学基金
江苏省教委自然科学基金
关键词
铵固定
钾固定
土壤
ammonium fixation
potassium fixation
soils
