%0 Journal Article
%T The effect of molecular weight of chitosan on soil''''s carbon, nitrogen and soil respiration<br>不同分子量壳聚糖对土壤碳、氮及呼吸的影响
%A ZHANG Wen-Qing
%A LU Wei-Jiao
%A CHEN Qiang
%A LI Hui-Xin
%A <br>张文清
%A 吕伟娇
%A 陈强
%A 李辉信
%J 生态学报
%D 2006
%I 
%X The molecular weight (MW) of chitosan added to the soil ecosystem has an apparent influence on the microbial biomass carbon and nitrogen (MBCN) from soil, soil respiration rate (SRR) and the mineral nitrogen e.g. NO_3-N and NH_4-N in soil, all of which increase with the amount of chitosan used. In the case of chitosan with lower MW, the MBCN, SRR and the NH_4-N increase rapidly first, and then gradually decrease. When chitosan with either medium or high MW was applied, no apparent change was observed on the MBCN and SRR at the initial period, starting from the 14 th day they increase rapidly, followed by the decrease after 34 days. The changes of NO_3-N follow the same trend as that the MBCN and SRR exhibited. This is in contrast to the NH_4-N. The latter increases significantly at the beginning of the addition of chitosan with lower molecular weight to the soil, and then slows down. When chitoson with medium MW was applied, the changes of NH_4-N were directly associated with the concentration of chitoson. After chitoson with high MW was added to the soil, one cannot observe the considerable changes of NH_4-N until the 24 th day.
%K chitosan
%K microbial biomass carbons and nitrogens
%K soil respiration<br>壳聚糖
%K 土壤微生物量碳、氮
%K 土壤呼吸
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=10393B821D9E8491&yid=37904DC365DD7266&vid=96C778EE049EE47D&iid=E158A972A605785F&sid=83B38B9EF611BE13&eid=0414C929218EC5F4&journal_id=1000-0933&journal_name=生态学报&referenced_num=3&reference_num=18