| 覆盖处理对干旱河谷区造林苗木生长及土壤速效氮的影响 |
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| 引用本文： | 左琴,姜广争,李猛,席光超,陈瑞华.覆盖处理对干旱河谷区造林苗木生长及土壤速效氮的影响[J].安徽农业科学,2014(19):6285-6287,6329. |
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| 作者姓名： | 左琴 姜广争 李猛 席光超 陈瑞华 |
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| 作者单位： | 海南省水利水电勘测设计研究院;海南省环境科学研究院; |
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| 摘 要： | 目的]研究不同覆盖处理方式对造林苗木生长及土壤速效氮含量的影响.方法]选取岷江上游山地森林/干旱河谷交错带下沿植树造林试验地段,研究了4种覆盖处理方式（覆草、覆皮、覆膜、挡水墙）对参试树种成活率、苗高生长量及其林下土壤速效氮含量影响.结果]不同覆盖处理方式均显著提高了参试树种的成活率及苗高生长量,其中成活率均值达到77.87％,较对照组提高了33.25％,而新疆杨苗高生长量显著高于其他树种,这与引种树种速生生理特性有关;覆盖处理均显著增加了油松、岷江柏、榆树林下土壤硝态氮和铵态氮含量,但其含量因不同覆盖方式、不同试验树种而呈现差异特征,对引种树种新疆杨林下土壤硝态氮和铵态氮无显著促进作用.结论]该研究对干旱河谷区植树造林树种及营林模式选取具有重要参考意义.
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| 关 键 词： | 覆盖处理 干旱河谷 生长 速效氮 |
Effect of Mulch Handlings on Trees Growth and Soil Available Nitrogen for Dry Valley |
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| Institution: | ZUO Qin et al ( Investigation and Design Institute of Water Resources and Hydropower Hainan Province, Haikou, Hainan 570203 ) |
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| Abstract: | Objective] Effect of mulch handlings on trees growth and soil available nitrogen was studied.Method] The paper selected the ecotone of the upper reaches of Minjiang River between mountain forest and dry valley as a testing ground of afforestation,and studied the four handlings of mulch （grass cover,turf,plastic film,retaining wall） on the tested species survival,growth and its soil available nitrogen contents.Result] The results show that all different handlings of mulch significantly improved the survival rate of the tested species and growth,where the mean survival rate reached 77.87%,increased 33.25% compared with the control group,but the Xinjiang populus growth was significantly higher than the others,this relevant with fast-growing tree species of Xinjiang populus on physiological characteristics.Mulching handlings significantly increased soil nitrate and ammonium nitrogen Pinus tabulaeformis,Cupressus chengiana,Ulmus pumila,but its content has differences because of different mulch handlings,test species.The introduced species of Xinjiang populus have no significant role in promoting on nitrate and ammonium nitrogen.Conclusion] The study has important reference value in selecting tree species and forest mode selection in dry valley afforestation. |
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| Keywords: | Mulch handlings Dry valley Growth Soil available nitrogen |
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