干旱区生态环境知识资源中心(Arid): 不同栽培模式及施氮量对土壤团聚体的影响

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	不同栽培模式及施氮量对土壤团聚体的影响
其他题名	Effects of different cultivating patterns and nitrogen fertilizer application on soil aggregates
	周从从; 陈竹君; 赵世翔; 周建斌; 张晓敏
来源期刊	干旱地区农业研究
ISSN	1000-7601
出版年	2013
卷号	31 期号:3 页码:100-105
中文摘要	通过长期定位试验研究了不同栽培模式(休闲,常规,覆草,垄沟覆盖)和施氮量(N0, N120, N240)条件下西北旱地土壤团聚体组成、稳定性及其与土壤有机碳、土壤水分、产量等的相关关系,结果表明:干筛法0.25~10 mm团聚体含量垄沟覆盖显著低于常规和覆草栽培模式,而>10 mm的大团聚体显著高于常规和覆草模式,垄沟覆盖栽培促进0.5~5 mm团聚体向更大级别进一步团聚;干筛法0.25~10 mm团聚体总量N240处理显著高于N0。湿筛法>0.25 mm水稳性团聚体含量覆草和垄沟覆盖栽培显著高于常规,不同施氮量间无显著差异。干筛法团聚体平均重量直径(MWD)和几何平均直径(GMD)垄沟覆盖显著大于覆草和常规模式;水稳性团聚体MWD覆草模式显著大于常规,覆草模式GMD显著大于垄沟覆盖模式;不同施氮量下水稳性团聚体MWD差异不显著,N0处理的GMD显著大于N120、N240。覆盖栽培可以提高土壤团聚体的稳定性,不同施氮量间团聚体稳定性差异不显著。历年2 m土层土壤贮水量平均值与水稳性团聚体GMD呈显著正相关,不同栽培模式主要通过影响土壤水分来影响土壤团聚体状况;历年平均产量与水稳性团聚体GMD呈显著负相关,说明干旱半干旱地区土壤水稳性团聚体直径应较小,利于提高土壤保水和水分有效性,进而促进作物产量的提高。
英文摘要	The composition, distribution and stability of aggregate, and its relationships with soil organic carbon, soil moisture and yield were studied in a long-term fixed-location experiment. Different cultivating patterns(F,CC,SC,RF+SC) and different nitrogen fertilizer amount(N0,N120,N240) were tested to investigate their effects on soil aggregates in dryland of northwest China. The results showed that: ridge furrow+ straw mulching pattern (RF+SC) planting significantly reduced the 0.25~10 mm dry-sieving aggregate content while significantly increased aggregate that is bigger than 10 mm, in comparison with conventional and straw mulching (SC) patterns. RF+SC pattern planting also promoted formation of bigger size aggregate from 0.5~5 mm one. Content of 0.25~10 mmaggregate by dry-sieving method was significantly higher in N240 treatment than in N0 treatment. Compared to conventional pattern, straw mulching significantly increased content of water stable aggregate with diameters greater than 0.25 mm. There were nosignificant differences in water stable aggregate with diameters greater than 0.25 mm among the different nitrogen fertilization treatments. Mean weight diameter (MWD) and geometric mean diameter (GMD) of soil aggregate by dry-sievingmethod were significantly higher in RF+SC pattern than in SC and conventional patterns. MWD of water-stable aggregate in SC pattern was significantly greater than in conventional patterns, and its GMD was also significantly greater than in RF+SC pattern. N0 treatment significantly improved GMD of water stable aggregate than N120 and N240 treatment; however, there was no significant difference in MWD among the three different N fertilizer treatments. Straw mulching and RF+SCpatterns improved soil aggregate stability. There was no significant differencein aggregate stability among different nitrogen treatments. A significant positive correlation was observed between the average of water storage in 2 m soil profile over the 7 years and GMD of water stable aggregate, indicating thatdifferent planting patterns affect soil aggregation through its influence on soil water and that soil water condition is the determent factor affected soil water stable aggregate in this region. The correlation between averageyield and GMD of water stability aggregate was significantly negative, indicating that small aggregate is benefit for crop yield.
中文关键词	栽培模式 ; 施氮量 ; 土壤团聚体组成 ; 平均重量直径(MWD) ; 几何平均直径(GMD)
英文关键词	cultivating patterns nitrogen fertilizer soil aggregate composition geometric mean diameter (GMD) mean weight diameter (MWD)
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:4867650
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378777
作者单位	周从从, 西北农林科技大学资源环境学院, 杨凌, 陕西 712100, 中国.; 赵世翔, 西北农林科技大学资源环境学院, 杨凌, 陕西 712100, 中国.; 周建斌, 西北农林科技大学资源环境学院, 杨凌, 陕西 712100, 中国.; 张晓敏, 西北农林科技大学资源环境学院, 杨凌, 陕西 712100, 中国.; 陈竹君, 西北农林科技大学资源环境学院, 农业部西北植物营养与农业环境重点实验室, 杨凌, 陕西 712100, 中国.
推荐引用方式 GB/T 7714	周从从,陈竹君,赵世翔,等. 不同栽培模式及施氮量对土壤团聚体的影响[J],2013,31(3):100-105.
APA	周从从,陈竹君,赵世翔,周建斌,&张晓敏.(2013).不同栽培模式及施氮量对土壤团聚体的影响.干旱地区农业研究,31(3),100-105.
MLA	周从从,et al."不同栽培模式及施氮量对土壤团聚体的影响".干旱地区农业研究 31.3(2013):100-105.