渭北旱腰带困难立地造林土壤肥力变化研究  

Soil FertilityChange inAfforestationof Difficult Sites in the Drought Belt of Weibei Region

作　　者：任俊澎 谢毓芬 陈鹏 黄智群 黄昱 郭晖 赵云 任博文 武建超 REN jun-peng;XIE yu-fen;CHEN peng;HUANG zhi-qun;HUANG yu;GUO hui;ZHAO yun;REN bo-wen;WU jian-chao(Shaanxi Academy of Forestry,Xi'an,Shaanxi 710082;Liquan County Forestry Workstation,Xianyang,Shaanxi 713200;Forestry Administration of in Shaanxi Province,Xi'an,Shaanxi 710082)

机构地区：[1]陕西省林业科学院,陕西西安710082 [2]礼泉县林业工作站,陕西咸阳713200 [3]陕西省林业局,陕西西安710082

出　　处：《陕西林业科技》2025年第2期20-25,共6页Shaanxi Forest Science and Technology

基　　金：中央财政中央财政林业科技推广示范项目《渭北旱腰带困难立地生态修复技术推广项目》(SLTG[2022]06)。

摘　　要：为更好的了解困难立地土壤施肥后对苗木生长状况的影响。本研究以油松为试验材料,在困难立地造林地设计试验,研究不同品种土壤肥料施肥后土壤理化性质和养分含量变化,分析苗木生长状况。结果表明,不同土壤肥料在不同施肥比例下,土壤pH、含水率、铵态氮、硝态氮、速效磷的整体变化趋势具有基本一致性。土壤pH值变化先降低后升高再降低,含水率变化先升高后降低再升高,铵态氮的变化情况为先升高后降低,硝态氮先降低再升高,速效磷的变化为先升高后降低。土壤全氮和有机质含量变化具有部分相同趋势。油松生长量测量后显示,枝条肥作用下苗木的冠幅生长量显著高于普通肥。该研究结果可为渭北旱腰带地区造林提供一定的数据支持,在造林时更准确地评估施肥比例和效果,降低造林成本,改良土壤状况,提高苗木成活率,进而改善当地的生态环境。In order to better understand the effect of fertilization on seedling growth in difficult site soil.WithPinustabulaeformisas the test material,the experiment was designed the afforestation in the difficult site to research the changes of soil physical and chemical properties and nutrient content after fertilization with different varieties of soil fertilizers,and to analyze the growth status of seedlings.The results showed that,under different fertilization ratios of various soil fertilizers,the overall trends in soil pH,moisture content,ammonium nitrogen,nitrate nitrogen,and available phosphorus exhibited basic consistency.Specifically,soil pH initially decreased,then increased,and finally decreased again;moisture content first increased,then decreased,and finally increased;ammonium nitrogen levels rose first and then fell;nitrate nitrogen levels fell initially and then rose;and available phosphorus levels increased first and then decreased.Changes in soil total nitrogen and organic matter content showed some similar trends.Measurements of Pinustabulaeformis growth revealed that the crown width growth of seedlings treated with branch fertilizer was significantly higher than that of seedlings treated with conventional fertilizer.The findings of this study can provide certain data support for afforestation in the dry belt of the Northern Wei River Region,enabling more accurate assessment of fertilization ratios and effects during afforestation,reducing afforestation costs,improving soil conditions,enhancing seedling survival rates,and ultimately improving the local ecological environment.

关 键 词：渭北旱塬 困难立地 造林 土壤肥力 

分 类 号：S158[农业科学—土壤学]