干旱区生态环境知识资源中心(Arid): 灌溉和施氮对免耕留茬春小麦农田土壤有机碳、全氮和籽粒产量的影响

Arid

	灌溉和施氮对免耕留茬春小麦农田土壤有机碳、全氮和籽粒产量的影响
其他题名	Effects of irrigation and N supply levels on soil organic carbon, total nitrogen and grain yield of spring wheat on no-tillage farmland with standing stubble
	俞华林 1; 张恩和 1; 王琦 2; 刘青林 1; 刘朝巍 1; 王田涛 1; 尹辉 3
来源期刊	草业学报
ISSN	1004-5759
出版年	2013
卷号	22 期号:3 页码:227-233
中文摘要	在甘肃省石羊河流域绿洲灌区,研究不同灌溉量和施氮量对留茬免耕春小麦收后0~30 cm土层土壤有机碳、土壤全氮和土壤碳氮比的影响。结果表明,在0~140 kg/hm~2施氮范围,土壤全氮和有机碳含量增施氮肥均明显增加,当施氮量超过140 kg/hm~2时,土壤有机碳随施氮量增加而降低,土壤全氮含量无明显变化。就平均施氮水平而言,土壤全氮和有机碳含量随灌溉量增加呈先升高后下降的趋势,适量灌溉(节水20%灌溉)促进土壤氮和碳的矿化速率,从而增加全氮和有机碳含量,但少量或过量灌溉降低土壤氮和碳的矿化速率,同时增加土壤氮和碳的损失,导致节水20%灌溉的土壤全氮含量(0.9 g/kg)和有机碳含量(14.22 g/kg)最高。就各灌溉水平平均值而言,当施氮达到221 kg/hm~2,春小麦籽粒产量(6 365 kg/hm~2)达到最大值,春小麦籽粒产量随灌溉量增加而增加。
英文摘要	A controlled study of irrigation and nitrogen (N) supply was conducted in the Hexi oasis to investigate the effects of different irrigation and N supply levels on soil organic carbon(OC), soil total nitrogen(TN), soil carbon and nitrogen ratio (OC/TN) of spring wheat on no-tillage farmland with standing stubble. With an increase in N supply rate, TN and OC contents considerably increased in soils. However, when N supply rates were higher than 140 kg N/ha, TN did not continuously increase with the increase in N supply rate, and OC even showed a decreasing trend. Irrespective of nitrogen levels, with an increase in irrigation level, TN and OC contents initially increased but then decreased in soils. An appropriate amount of irrigation (20% watersaving irrigation) promoted the mineralization rate of soil nitrogen and carbon, thus increasing the TN and OC contents. However, a smaller amount of, or excessive, irrigation reduced soil nitrogen and carbon mineralization rates, and increase soil nitrogen and carbon losses. The highest TN (0.9 g/kg) and OC (14.22 g/kg) were measured under 20% watersaving irrigation. When the N supply rate was 221 kg N/ha, the grain yield reached a maximum (6 365 kg/ha) irrespective of the irrigation levels but the grain yield of spring wheat increased with an increase in irrigation level.
中文关键词	春小麦:免耕留茬 ; 灌溉 ; 施氮 ; 有机碳 ; 碳氮比
英文关键词	spring wheat no-tillage with stubble standing irrigation nitrogen supply organic carbon OC/TN
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRONOMY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4852839
来源机构	甘肃农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229292
作者单位	1.甘肃农业大学农学院, 兰州, 甘肃 730070, 中国; 2.甘肃农业大学草业学院, 冻土工程国家重点实验室, 兰州, 甘肃 730070, 中国; 3.甘肃农业大学草业学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	俞华林,张恩和,王琦,等. 灌溉和施氮对免耕留茬春小麦农田土壤有机碳、全氮和籽粒产量的影响[J]. 甘肃农业大学,2013,22(3):227-233.
APA	俞华林.,张恩和.,王琦.,刘青林.,刘朝巍.,...&尹辉.(2013).灌溉和施氮对免耕留茬春小麦农田土壤有机碳、全氮和籽粒产量的影响.草业学报,22(3),227-233.
MLA	俞华林,et al."灌溉和施氮对免耕留茬春小麦农田土壤有机碳、全氮和籽粒产量的影响".草业学报 22.3(2013):227-233.