干旱区生态环境知识资源中心(Arid): 干旱荒漠条件下残茬分解特征和养分释放的研究

Arid

	干旱荒漠条件下残茬分解特征和养分释放的研究
其他题名	Study on residue decomposition and nutrient elements releasing in arid desert ecosystem
	孙本华 1; 吕家珑 1; 张一平 1; 孙升学 1; 马健 2
来源期刊	干旱地区农业研究
ISSN	1000-7601
出版年	2003
卷号	21 期号:3 页码:34-37
中文摘要	以大豆秆为材料研究了荒漠生态条件下残茬的腐解率、腐解物的有机C、N和K的含量、养分释放率和C／N比的变化。结果表明：残茬的累积腐解率和有机C的分解率随腐解时间的延长呈上升的趋势，o～1．5个月和1．5～3个月残茬腐解率分别达19.7％和18．5％，0～1．5个月和1．5～3个月残茬有机C的分解率均为19．2％；腐解残留物的有机C、N和K的含量存在不同的变化，有机C的含量变化不大，N的含量则是先逐渐上升，6个月后基本不变，K的含量前1．5个月迅速下降，1．5～3个月缓慢下降，然后基本不变：整个腐解过程是N的固定过程，N的释放量和释放率均为负值，K的释放集中在前1．5个月，释放率达?5．8％；腐解残留物的C／N比先迅速下降，6个月后基本不变，最终为35．9。
英文摘要	Quantitative studies on changes of decay rate, nutrients releasing rate, C/N ratio, and con-tant of N, K and organic C of soybean residue during decomposition in arid desert ecosystem were carried out in Fukang, Xinjiang. The results showed that accumulative decay rate and organic C decomposition increased with the increase of decay time. The decay rate and organic C decomposition rate in the first 1. 5 months were the highest and reached 19. 7% and 19. 2%, respectively; in 1. 5-3 months were 18. 5% and 19. 2%, respectively. The changes of organic C, N and K in decay remainders were different. The content of organic C almost didn’t change during the whole decay time. The content of nitrogen increased in 6 months gradually, and then kept steady. The content of K decreased quickly in 1. 5 months, and decreased slowly in 1. 5~3 months, and then kept steady. The accumulative releasing amounts and rate of N were negative, since the whole decay course was a period of N fixation. The releasing of K focused in 1. 5 months, the accumulative releasing rate reached 75. 8%. The C/N ratio of decay remainders decreased quickly in 6 months, then didn’t change on the whole. The final C/N ratio was 35. 9.
中文关键词	大豆秆 ; 残茬分解 ; 养分释放 ; 干旱荒漠
英文关键词	soybean residue residue decay nutrient releasing arid desert ecosystem
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:1342116
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/203992
作者单位	1.西北农林科技大学资源与环境学院, 杨凌, 陕西 712100, 中国; 2.中国科学院阜康荒漠生态系统观测试验站, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	孙本华,吕家珑,张一平,等. 干旱荒漠条件下残茬分解特征和养分释放的研究[J]. 西北农林科技大学,2003,21(3):34-37.
APA	孙本华,吕家珑,张一平,孙升学,&马健.(2003).干旱荒漠条件下残茬分解特征和养分释放的研究.干旱地区农业研究,21(3),34-37.
MLA	孙本华,et al."干旱荒漠条件下残茬分解特征和养分释放的研究".干旱地区农业研究 21.3(2003):34-37.