干旱区生态环境知识资源中心(Arid): 河西走廊绿洲灌区循环模式农田-食用菌生产系统氮素流动特征

Arid

	河西走廊绿洲灌区循环模式农田-食用菌生产系统氮素流动特征
其他题名	Nitrogen flows in"crop-edible mushroom"production systems in Hexi Corridor Oasis Irrigation Area
	李瑞琴 1; 于安芬 1; 赵有彪 1; 车宗贤 2; 苏永生 1
来源期刊	生态学报
ISSN	1000-0933
出版年	2013
卷号	33 期号:4 页码:1292-1299
中文摘要	河西走廊绿洲灌区在农业产业化进程加快的同时,也带来了水资源和生态环境的压力。本文利用养分流动和模型分析的方法,分析河西走廊绿洲灌区典型"农田-食用菌"生产系统(农田-食用菌集约生产模式、农田-食用菌单户生产模式、农田单作)的氮元素流动特征。结果表明:农田作物秸秆通过食用菌体系还田使氮素利用率提高了10%左右,秸秆还田氮输入量(165.6kg.hm~(-2).a~(-1))占农田氮素总输入量的37.1%,使化肥氮输入量减少,因此秸秆氮的合理循环利用可作为减少化肥投入的有效途径。但农田氮素仍有盈余,单位面积氮盈余量高达217.0 kg.hm~(-2)a~(-1),未能实现循环模式内养分平衡的理想效果,因此优化氮素管理、确定合理的大田作物和食用菌面积、调整农业产业结构是解决该问题的关键。
英文摘要	With the rapid development of agricultural industrialization process,has resulted in greatly negative effects on the water resources and ecological environment in the Hexi corridor oasis irrigation area. In this study,three types ofcropedible mushroomproduction systems in the Oasis Irrigation Area of Hexi Corridor were selected. The first type was an crop-edible mushroom intensive production mode,which included edible mushroom and crop production consisting of 100 hm~(-2) farmland holders; the second type was so calledcrop-edible mushroom single peasant production mode; the third one was asingle cropping region which had no edible mushroom production. The characteristics of nitrogen (N) flows in these three systems were analyzed using the nutrient flows method. The results showed that it is increased by 10% of nitrogen use efficiencies through thecrop-edible mushroomsystems for crop straw returning to field. The N application rate of chemical fertilizers was 165. 6 kg·hm~(-2)·a~(-1),which accounted for 37. 1% of total N input. Consequently,this confirmed that the recycling of straw N is an efficient way to reduce the application rate of chemical N fertilizer. Positive cropland N balances resulted across all three types ofcrop-edible mushroomsystems,the cropland nitrogen surplus reached 217. 0 kg·hm~(-2)·a~(-1), indicating that the purpose of nutrient balance in circulation mode was not achieved as planned. It is concluded that a proper area of crop and edible mushroom with the optimization of N management and adjustment of the agricultural industrial structure are the keys to solve this issue.
中文关键词	绿洲灌区 ; 循环模式 ; 农田-食用菌生产系统 ; 氮素流动
英文关键词	Hexi Corridor Oasis Irrigation Area cycle mode crop-edible mushroomproduction systems Nitrogen Flows.
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:4769122
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229979
作者单位	1.甘肃省农业科学院畜草与绿色农业研究所, 兰州, 甘肃 730070, 中国; 2.甘肃省农业科学院农业质量标准与检测技术研究所, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	李瑞琴,于安芬,赵有彪,等. 河西走廊绿洲灌区循环模式农田-食用菌生产系统氮素流动特征[J],2013,33(4):1292-1299.
APA	李瑞琴,于安芬,赵有彪,车宗贤,&苏永生.(2013).河西走廊绿洲灌区循环模式农田-食用菌生产系统氮素流动特征.生态学报,33(4),1292-1299.
MLA	李瑞琴,et al."河西走廊绿洲灌区循环模式农田-食用菌生产系统氮素流动特征".生态学报 33.4(2013):1292-1299.