Quantitative studies on changes of decomposition rate, C/N ratio, N, K and organic C of bean residue during decomposition in desert ecosystem were carried out in Fukang, Xinjiang. Results showed that Accumulative decay rate and organic C decomposition rate of bean residue increased followed by the increasing of decomposition time. The decay rate in 0~1.5 month and 1.5~3 month were 18.9% and 18.7%, respectively. The total N increased gradually first, then kept on after 6 months. The total K decreased quickly at the first 1.5 month, then decreased slowly, then kept on after 3 months. The releasing amount and releasing rate of N were all minus. There was no releasing of N in the whole of decomposition. The releasing rate of K reached 75.8% in 1.5 months, then changed around 90%. The C/N ratio of decay remainders decreased quickly first, then didn’t change on the whole after 6 months, and finally it was 35.9.
Sun Benhua,, Gao Mingxia, Lü Jialong, Zhang Yiping
. The Decomposition of Residue and Nutrient Releasing Under the Condition of Desert Ecosystem[J]. Chinese Agricultural Science Bulletin, 2005
, 21(5)
: 390
-390
.
DOI: 10.11924/j.issn.1000-6850.0505390
1Brown P L,Dickey D D. Losses of wheat straw residues under simulated field condition [J]. Soil Sci Soc of Am Proc,1970,34:118~121
2Hice T,Todd R L. Decomposition of crop residues under conventional and mininum practices[J]. Agronomy Abstracts, 1980,72: 154
3李庆民,肖仲纯.草木栖、麦秸和泥炭在黑土中腐解特点和土壤肥力的影响[J].土壤学报,1986,23(2):124~131
4丁庆堂,邱凤琼,汪炎炳,等.草甸黑土中植物残体的分解速率[J].土壤通报,1986,17(7):56~60
5张洪源,刘明钟,张家建.有机物料在旱地土壤中分解规律的研究[J].土壤肥料,1986,(4):7~11
6吴珊眉, House G J,韩纯儒.免耕和常规耕作农田生态系统冬季覆盖作物残茬分解和养分变化[J].土壤学报,1986,23(3):204~211
7中国科学院南京土壤研究所.土壤理化分析[M].上海:上海科学技术出版社,1978.367,376~377
8Emteryd O.植株、土壤、水和空气中无机营养元素的物理化学分析[M].西安:陕西科学技术出版社,2003.140~142