[1]蔺鑫,李想,王安宁,等. 冀东滨海盐碱地造林密度对白榆生长和土壤理化性质的影响[J].西北林学院学报,2018,33(5):66-74.[doi:10.3969/j.issn.1001-7461.2018.05.10]
　LIN Xin,LI Xiang,WANG An-ning,et al. Effects of Planting Densities on the Growth and Soil Physico-Chemical Properties of Ulmus pumila in Seashore Saline-Alkali Land of Jidong[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2018,33(5):66-74.[doi:10.3969/j.issn.1001-7461.2018.05.10]
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 冀东滨海盐碱地造林密度对白榆生长和土壤理化性质的影响()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第33卷
期数:
2018年第5期
页码:
66-74
栏目:
出版日期:
2018-09-30

文章信息/Info

Title:
 Effects of Planting Densities on the Growth and Soil Physico-Chemical Properties of Ulmus pumila in Seashore Saline-Alkali Land of Jidong
文章编号:
1001-7461(2018)05-0066-09
作者:
 蔺鑫1; 李想2; 王安宁1; 李玉灵1*; 王玉忠3; 李晓刚1
 （1.河北农业大学 林学院，河北 保定 071000；2.中国林业科学研究院 森林生态环境与保护研究所，北京 100000；3.河北省林业科学研究院，河北 石家庄 050000）
Author(s):
LIN Xin1; LI Xiang2; WANG An-ning1; LI Yu-ling1*; WANG Yu-zhong3; LI Xiao-gang1
 (1.Colleage of Forestry,Agricultural University of Hebei,Baoding,Hebei 071000,China; 2.Institute of Forest Ecological Environment and Protection,Chinese Academy of Forestry,Beijing 100000,China；3.Hebei Academy of Forestry Sciences，Shijiazhuang,Hebei 050000,China)
关键词:
 ; 造林; 白榆; 盐碱地; 土壤
Keywords:
 ; forestation;  U.pumila;  salt-alkali land;  soil
分类号:
S728.5
DOI:
10.3969/j.issn.1001-7461.2018.05.10
文献标志码:
A
摘要:
 研究揭示冀东滨海盐碱地造林密度对白榆生长和对盐碱土壤理化性质的改良作用，确定盐碱地上适宜的造林密度，进一步构建盐碱地生态经济型造林模式。在河北省盐山县进行高密型（1 m×4 m）、中密型（2 m×4 m）、稀疏型（3 m×4 m）3个密度的植苗造林试验，以盐碱荒地作为对照(CK)。测定植物胸径、生物量等生长相关的指标和土壤容重、持水量、孔隙度以及有机质、N、P、K含量等理化性质指标，并进行不同密度造林土壤肥力改良效果综合评价。结果表明：1)白榆胸径、地上生物量、地下生物量和根冠比均在中密型密度下达到最大。2)各造林密度土壤自然含水量、田间持水量、管持水量较CK均有提高，且随造林密度增大逐渐增大，高密型和中密型改善效果最好，2种持水量平均值均显著>CK(P<0.05)。3) 中密型密度的土壤总孔隙度、非毛管孔隙度和毛管孔隙度平均值均最大，且总孔隙度和毛管孔隙度显著>CK(P<0.05)。4) 中密型密度对土壤pH和全盐含量改善效果最好，平均值均显著<CK(P<0.05)。5)各造林密度下土壤全K、速效K、碱解N、全P含量均>CK，其中中密型密度下以上4种养分含量平均值均显著>CK(P<0.05)，分别为13.74、781.97、23.03 mg·kg-1和0.70 g·kg-1。6)3种造林密度的盐碱地土壤肥力综合评价值均>CK，中密型密度最大0.560，稀疏型密度次之。研究结果表明，中密型造林密度最适宜白榆作为冀东滨海盐碱地改良的造林密度。
Abstract:
 In order to reveal the effects of planting density on the growth and soil physico-chemical properties of Ulmus pumila in seashore salt-alkali land in eastern Hebei Province,to find out optimal planting density and to build the eco-ecological afforestation pattern in seashore salt-alkali land,an afforestation experiment was carried out in Yanshan county of Hebei province with U.pumila,3 density types were set up:high density (1 m×4 m),medium density (2 m×4 m) and low density (3 m×4 m).The saline-alkali land on which no U.pumila trees were planted was used as control.The plant DBH,biomass and soil bulk density,water holding capacity,porosity,organic matter,nitrogen,phosphorus and potassium contents were measured.The effects of soil fertility improvement on afforestation with different densities were evaluated.The results were as follows.1)The diameter,the aboveground biomass,the underground biomass and the rootshoot ratio of U.pumila reached the maximum at medium density.2) Soil water-holding capacity in the control land was poorer.While the nature water capacity,field moisture capacity,capillary moisture capacity and saturation moisture capacity under the 3 planting densities were higher than those of the control,and these parameters increased with the increase of planting density.High density type and medium density type had the best soil improving effects,in which 2 water-holding capacity indexes were significantly higher than that of control (P<0.05).3) The means of soil total porosity,non-capillary porosity,capillary porosity were all higher than those of the control at the medium density typmore.The total porosity and capillary porosity were significantly higher than those of the control (P<0.05).4) Medium density type had best reducing effects on soil pH and total salt content,in which the average values were significantly lower than those of the control (P<0.05).5) Soil total potassium,available potassium,hydrolysis nitrogen,total phosphorus contents in all planting densities were higher than the control.The means of above 4 nutrient contents under medium density were 13.74 g·kg-1,781.97 mg·kg-1,23.03 mg·kg-1,0.70 g·kg-1,respectively,which significantly higher than those of the control (P<0.05).6) The comprehensive evaluation value of the soil fertility in 3 planting density treatments were higher than the control.The largest value was 0.560 under medium density,followed by low type.Considering the results comprehensively,it was recommended that medium density type was favorable for the improvement in seashore saline-alkali land of eastern Hebei.

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备注/Memo

备注/Memo:
 收稿日期：2017-12-15修回日期：2018-05-28
基金项目：河北省高层次人才资助项目：京津冀生态安全与协同发展规划(B2014010004)。
作者简介：蔺鑫，男，硕士研究生，研究方向：盐碱地治理修复。E-mail：721865010@qq.com
*通信作者：李玉灵，女，博士，教授，研究方向：恢复生态学。E-mail：liyuling0425@126.com
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