干旱区生态环境知识资源中心(Arid): 石漠化区退耕植桑地土壤养分与生态化学计量特征

Arid

	石漠化区退耕植桑地土壤养分与生态化学计量特征
其他题名	Nutrients and Ecological Stoichiometry Characteristics of Soil from Returning Farmland to Mulberry Field in Stony Desertification Area
	邢丹 1; 肖玖军 2; 王晓红 3; 张芳 3; 韩世玉 3; 罗朝斌 3
来源期刊	西南农业学报
ISSN	1001-4829
出版年	2018
卷号	31 期号:7 页码:1436-1443
中文摘要	【目的】探明石漠化地区退耕植桑后土壤养分与生态化学计量变化特征,为进一步优化石漠化地区桑园管理提供的理论依据.【方法】结合实际调研,以空间代替时间方法,选取荔波退耕还林1年的桑园作为对照,研究还林10年的桑园土壤在不同季节、不同剖面养分及其生态化学计量变化特征.【结果】①石漠化地区退耕植桑利于土壤养分的改善,桑树在全年生长过程中养分呈波动性变化;不同土层还林桑园土壤C、N、P具有表聚性现象,随土层深度递增而逐渐减少.还林10年桑园土壤有机碳和全钙含量随季节变化呈降-升-降变化,全氮和全磷含量持续下降,全钾含量呈先降后升的变化趋势.②石漠化地区退耕还林种植桑树后,还林10年的桑园土壤C/N、C/P、N/P增大,而C /K、C/Ca和N/K减少.C /P、N/P随季节变化呈升高趋势,但随剖面深度呈急剧减小趋势.【结论】桑园土壤主要受磷素限制,其次是氮素.在经营管理桑园时,除补充所需养分,还需注重土壤元素间变化.退耕还林桑园土壤生态化学计量比与养分显著相关,OC(有机碳) 、TN(全氮)对土壤C /P、C /K、N/P、N/K贡献为正,TCa(全钙)对土壤C/K、N/K贡献为正,而TP(全磷)对土壤C/P、N/P贡献为负,TK(全钾) 、TCa对C/Ca贡献为负.
英文摘要	【Objective】The present paper aimed to provide the theoretical basis for optimization management of mulberry field by verifying nutrients and ecological stoichiometry characteristics of soil from returning farmland to mulberry field in stony desertification region. 【Method】 The nutrients and ecological stoichiometry characteristics of soils with different soil depth of Libo mulberry field(returning farmland to forestry for one year) and Bijie mulberry field(returning farmland to forestry for ten years) in different season were studied by the space replacing time method and actual investigation. 【Result】(i)The returning farmland to mulberry field is beneficial for improvement of soil nutrients in stony desertification region. The nutrients of mulberry present the fluctuating variation trend during the year-round growth process. The C,N and P in mulberry field soils with different soil depth has asurface segregation’characteristics and their content gradually reduces with increase of soil depth. The organic carbon and total Ca content in the soil of Bijie mulberry field(returning farmland to forestry for ten years) shows a decline-rise-decline trend,the total nitrogen and total phosphorus content decreases continuously and total potassium content presents a first decline and then rise trend. (ii) C/N,C/P and N/P ratio of the soil from Bijie mulberry field(returning farmland to forestry for ten years) increases but its C/K,C/Ca and N/K ratio decreases. The C /P and N/P ratio presents a rising trend with seasonal variation but a rapid decrease trend with increase of soil depth.【Conclusion】The phosphorus is the main limitation factor to influence soil of mulberry fields,followed by nitrogen factor. The needed nutrients for mulberry should be supplied and the variation between different soil elements should be paid attention in management of mulberry fields. The soil ecological stoichiometry ratio of the mulberry field from returning farmland to forestry is significantly related to its nutrients. The contribution of organic carbon and total nitrogen is positive to soil C /P,C /K,N/P and N/K. The contribution of total Ca is positive to soil C/K and N/K. The contribution of total phosphorus is negative to soil C /P and N/ P. The contribution of total potassium is negative to soil total Ca and C /Ca.
中文关键词	石漠化 ; 退耕还林 ; 桑园 ; 土壤 ; 生态化学计量
英文关键词	Stony desertification Returning farmland to forestry Mulberry field Soil Ecological stoichiometry
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:6307474
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238512
作者单位	1.贵州大学林学院;;贵州省农业科学院蚕业研究所, ;;, 贵阳;;贵阳, 贵州;;贵州 550025;;550006, 中国; 2.贵州省山地资源研究所, 贵阳, 贵州 550001, 中国; 3.贵州省农业科学院蚕业研究所, 贵阳, 贵州 550006, 中国
推荐引用方式 GB/T 7714	邢丹,肖玖军,王晓红,等. 石漠化区退耕植桑地土壤养分与生态化学计量特征[J],2018,31(7):1436-1443.
APA	邢丹,肖玖军,王晓红,张芳,韩世玉,&罗朝斌.(2018).石漠化区退耕植桑地土壤养分与生态化学计量特征.西南农业学报,31(7),1436-1443.
MLA	邢丹,et al."石漠化区退耕植桑地土壤养分与生态化学计量特征".西南农业学报 31.7(2018):1436-1443.