Soil nitrate-N residue, loss and accumulation affected by soil surface management and precipitation in a winter wheat-summer fallow system on dryland

被引：39

作者：

He, Gang ^{[1
,2
]}

Wang, Zhaohui ^{[1
,2
]}

Li, Fucui ^{[1
,2
]}

Dai, Jian ^{[1
,2
]}

Ma, Xiaolong ^{[1
,2
]}

Li, Qiang ^{[1
,2
]}

Xue, Cheng ^{[1
,2
]}

Cao, Hanbing ^{[1
,2
]}

Wang, Sen ^{[1
,2
]}

Liu, Hui ^{[1
,2
]}

Luo, Laichao ^{[1
,2
]}

Huang, Ming ^{[1
,2
]}

Malhi, Sukhdev S. ^{[3
]}

机构：

[1] Northwest Agr & Forestry Univ, State Key Lab Crop Stress Biol Arid Areas, Yangling 712100, Shaanxi, Peoples R China

[2] Northwest Agr & Forestry Univ, Minist Agr, Key Lab Plant Nutr & Agrienvironm Northwest China, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China

[3] Univ Alberta, Dept Renewable Resources, Edmonton, AB, Canada

来源：

NUTRIENT CYCLING IN AGROECOSYSTEMS | 2016年 / 106卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Grain yield; Total N uptake; Soil water; Plastic film mulch; Straw mulch; Green manure; LOESS PLATEAU; NITROGEN MINERALIZATION; CROPPING SYSTEM; USE EFFICIENCY; GRAIN YIELD; WATER-USE; STRAW; FERTILIZATION; ROTATION; PHOSPHORUS;

D O I：

10.1007/s10705-016-9787-9

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Soil nitrate-N residue after harvesting crops and nitrate-N loss during the following fallow season is serious concern for the agricultural environment in dryland. A 6-year-long, location-fixed field experiment was conducted to determine the effects of plastic film mulch (PM), straw mulch (SM), green manure (GM) and straw mulch plus green manure (SGM) on the nitrate-N residue, loss and accumulation in a winter wheat-summer fallow system. Compared with the bare fallow, average grain yield was increased by 6 % with PM, whereas decreased by 7, 5 and 5 % with SM, GM and SGM, respectively. Average total N uptake was decreased by 13 % with SM, but not affected by PM, GM and SGM. Average nitrate-N residue at wheat harvest was decreased by 35, 32 and 18 % with PM, SM and SGM, respectively, but not affected by GM. Average soil water recharge was increased by 12 % with PM, and not affected by SM, whereas decreased by 20 and 16 % with GM and SGM, respectively. For the PM, SM, GM and SGM, the average nitrate-N loss from top soil was decreased by 51, 53, 50 and 34 %, respectively, and the average nitrate-N accumulation in deep soil was decreased by 56, 45, 31 and 39 %. Above results revealed that increasing the yield decreased soil nitrate-N residue, and nitrate-N loss and accumulation was restricted by the decreased nitrate-N residue and soil water recharge. Overall, PM is a preferable measure for the decreased nitrate-N residue, loss and accumulation, at the same time increased the yield in dryland.

引用

页码：31 / 46

页数：16

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