干旱区生态环境知识资源中心(Arid): 三峡库区紫色土旱坡地农桑配置模式对土壤养分的影响

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	三峡库区紫色土旱坡地农桑配置模式对土壤养分的影响
其他题名	Effects of different crop-mulberry intercropping systems on nutrients in arid purple soils in the Three Gorges Reservoir Area
	刘月娇; 倪九派; 张洋; 周川
来源期刊	草业学报
ISSN	1004-5759
出版年	2015
卷号	24 期号:12 页码:38-45
中文摘要	针对三峡库区紫色土流失严重和土壤肥力低的现状,本试验利用水土保育模式--农桑间作试验,研究横坡农作(CT)、双边桑树+横坡农作(T_1)、等高桑树+双边桑树+横坡农作(T_2)及四边桑树+等高桑树+横坡农作(T_3)4个处理对土壤养分的影响。结果表明,桑树布局小区内的土壤碱解氮、速效磷、速效钾和有机质含量均有极显著提高,且土壤碱解氮、速效磷、速效钾和有机质含量平均值大小均表现为:等高桑树+双边桑树+横坡农作(T_2)>四边桑树+等高桑树+横坡农作(T_3)>双边桑树+横坡农作(T_1)>横坡农作(CT)。4个处理的土壤碳氮比和碳磷比变化幅度分别在7~20和10~27之间,其中等高桑树+双边桑树+横坡农作(T_2)小区各个坡长的土壤碳氮比和碳磷比最大。土壤有机质、碱解氮、速效钾、碳磷比与玉米和榨菜产量具有极显著的正相关关系。可见,旱坡地农桑配置模式在一定程度上可以提高和维持土壤养分,降低上坡段土壤碳氮比和碳磷比,从而为三峡库区水土保育模式优选提供理论依据。
英文摘要	To help address the problem of purple soil erosion on sloping land in Chongqing city, an experiment has been undertaken to investigate the effects of different crop-mulberry intercropping systems on soil nutrients. Four treatments were designed: crops were planted along transverse slopes (CT), crops were planted along transverse slopes with mulberry trees on the upper and lower slopes (T_1), crops were planted along transverse slopes with mulberry trees on the upper, middle and lower slopes (T_2); and crops were planted along transverse slopes with mulberry trees on the middle slope and on the four sides of the slope (T_3). The results showed that soil available nitrogen, available phosphorus, potassium and organic matter contents were significantly improved with mulberry intercropping. The sequence of improvement was T_2>T_3>T_1>CT. The ratios of carbon/nitrogen and carbon/phosphorus changed from 7 to 20 and from 10 to 27 respectively for the four treatments. The carbon/nitrogen and carbon/phosphorus ratios were largest in the T_2 treatment for every slope level. Soil organic matter, nitrogen, potassium, carbon/nitrogen ratio, carbon/phosphorus ratio and crop output were all significantly positively correlated. In conclusion, crop-mulberry intercropping in hillside fields improved and maintained soil nutrients and to some extent decreased the ratios of carbon/nitrogen and carbon/phosphorus in uphill soils. These results can be used to guide the choice of water and soil conservation cropping modes in the Three Gorges Reservoir Area.
中文关键词	三峡库区 ; 紫色土 ; 桑树布局 ; 土壤养分
英文关键词	Three Gorges Reservoir Areas purple soil the mulberry layout soil nutrients
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:5592891
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232439
作者单位	西南大学资源环境学院, 重庆 400715, 中国
推荐引用方式 GB/T 7714	刘月娇,倪九派,张洋,等. 三峡库区紫色土旱坡地农桑配置模式对土壤养分的影响[J],2015,24(12):38-45.
APA	刘月娇,倪九派,张洋,&周川.(2015).三峡库区紫色土旱坡地农桑配置模式对土壤养分的影响.草业学报,24(12),38-45.
MLA	刘月娇,et al."三峡库区紫色土旱坡地农桑配置模式对土壤养分的影响".草业学报 24.12(2015):38-45.