%0 Journal Article
%T Coupling effect of inorganic nitrogen and cabbage waste on soil nitrogen mineralization<br>无机氮与蔬菜废弃物耦合对土壤氮矿化的影响*
%A HU Guo-Ping
%A CAO Jing
%A YANG Hai-Xing
%A WEI Hong-Xia
%A <br>胡国平
%A 曹 靖
%A 杨海兴
%A 魏红霞
%J 中国生态农业学报
%D 2012
%I 
%X A 100-day laboratory incubation experiment was conducted under controlled conditions (25 °C and 65% moisture content) to determine the effect of addition of waste cabbage leaves B1: 200 g?kg-1(soil), B2: 400 g?kg-1(soil), B3: 550 g?kg-1(soil)] coupled with inorganic nitrogen N0: 0 mg(N)?kg-1(soil), N1: 25 mg(N)?kg-1(soil), N2: 50 mg(N)?kg-1(soil), N3: 100 mg(N)?kg-1(soil)] on amended soil nitrogen (N) mineralization. Results showed that soil net accumulated N mineralization under different inorganic N treatments were 4~5 times of that under the control (CK). Furthermore, net accumulated N mineralization under N1 treatment was significantly higher than those under other N treatments. Net accumulated N mineralization under waste cabbage leaves treatments were 3~5 times of that under CK. Net accumulated N mineralization under B2 treatment was significantly higher than those under B1 and B3 treat-ments. Statistical analysis showed no significant interaction effect was noted (P=0.275) between inorganic N and waste cabbage leaves treatments. Waste cabbage leaves addition was the dominant driving factor (Eta2=0.16) of amended soil N mineralization while inorganic N supply was only a secondary factor (Eta2=0.07). In the early period (0~20 d) of the incubation treatment, net accumulated N mineralization gradually increased and then maintained a steady trend in the later stage under B1 treatment. However, N mineralization, immobilization and re-mineralization occurred in the early period of incubation (30 d) while net accumulated N mineralization increased gradually in the later stage under B2 and B3 treatments. The results of N mineralization rate showed that N mineralization mainly occurred in the first 30 days as affected by waste cabbage leaves addition. Also during incubation, a ?rst-order kinetics equation of amended soil net accumulated N mineralization fitted well with the days of incubation (R2=0.62~0.89).
%K Soil nitrogen mineralization
%K Net accumulated N mineralization
%K Waste cabbage leaves
%K Inorganic nitrogen
%K Carbon/nitrogen ratio<br>土壤氮矿化
%K 净累积矿化量
%K 甘蓝废弃叶
%K 无机氮水平
%K 碳氮比
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=AB3ABF502E2E1FF39F0E3B80164C9031&aid=197CD8C639E8F13F0A143BFAFEBBEAB0&yid=99E9153A83D4CB11&vid=A04140E723CB732E&iid=B31275AF3241DB2D&sid=547991B346A6585E&eid=04EA291949415E08&journal_id=1671-3990&journal_name=中国生态农业学报&referenced_num=0&reference_num=0