长春城市森林绿地土壤肥力评价

发布时间：2018-08-19 13:37

【摘要】：以长春城市森林绿地为研究对象,测定9种土壤指标并参照全国第二次土壤普查分级标准对长春城市森林绿地土壤整体特征进行评级,采用内梅罗指数法分析长春城市森林绿地不同林型、行政区、环路土壤肥力,结合ArcG IS分析长春城市森林绿地土壤养分空间分布特征,以期对长春城市森林建设提供依据和建议。对比全国第二次土壤普查所确定的分类等级(6等级),土壤有机质平均含量(34.51 g/kg)及其空间分布(大部分区域30 g/kg)达到了2级、含量高的水平;全氮(均值1.37 g/kg)、碱解氮(均值133.04 mg/kg)、速效磷(均值38.47 mg/kg)及其空间分布均达到了3级以上水平;全钾(均值58.7 g/kg)和速效钾(均值255.85 mg/kg)及其空间分布达到1级、含量很高的水平;全磷平均含量0.51 g/kg,空间上大部分区域集中在0.4—0.6g/kg,为4级、含量中下水平。土壤pH为5.43—8.89,容重为1.11—1.62 g/cm~3。内梅罗综合肥力指数分析表明长春城市多数区域处于1.5—1.8之间,处于中等水平(4级制中排第3级)。不同林型间差异主要表现在pH、全氮、全磷和碱解氮(P0.05),不同环路间差异主要在pH、有机质和全磷(P0.05),而不同行政区间差异指标最多,为有机质、全氮、碱解氮、全磷、速效磷和pH(P0.05)。综合肥力指数显示:景观林单位附属林=农田防护林道路林,绿园区朝阳区南关区二道区宽城区,1环3=4环2环4环外。根据以上结果,可采取疏松土壤、枯枝落叶沤肥、增施氮磷有机肥而控制钾肥、种植固氮耐低磷植物等措施推进长春城市森林建设,提升城市植被生态服务功能。
[Abstract]:Taking the urban forest green space of Changchun as the research object, 9 kinds of soil indexes were determined, and the overall characteristics of the forest green land in Changchun city were rated according to the grading standard of the second national soil census. The soil fertility of different forest types, administrative regions and circular roads in Changchun city was analyzed by using Nemero index method, and the spatial distribution characteristics of soil nutrients in Changchun city forest green land were analyzed with ArcG is. With a view to Changchun urban forest construction to provide the basis and suggestions. The average content of soil organic matter (34.51 g/kg) and its spatial distribution (30 g/kg in most regions) reached the level of grade 2 (high level) compared with the classification grade (grade 6) determined by the second national soil census. Total nitrogen (mean 1.37 g/kg), alkali-hydrolyzed nitrogen (mean 133.04 mg/kg), available phosphorus (mean 38.47 mg/kg) and their spatial distribution reached above 3 levels, total potassium (mean 58.7 g/kg) and available potassium (mean 255.85 mg/kg) and their spatial distribution reached 1 grade, with high content. The average content of total phosphorus was 0.51 g / kg, and most of the regions in space were concentrated in the range of 0.4-0.6 g / kg. Soil pH was 5.43-8.89, bulk density was 1.11-1.62 g / cm ~ (-1). Nemero comprehensive fertility index analysis showed that most areas of Changchun city were in the range of 1.5-1.8, and were in the middle level (the 3rd grade in the 4-level system). The main differences among different forest types were pH, total nitrogen, total phosphorus and alkali-hydrolyzed nitrogen (P0.05). The main differences among different loops were pH, organic matter and total phosphorus (P0.05), while the most significant differences among different administrative regions were organic matter, total nitrogen, alkali-hydrolyzed nitrogen, total phosphorus, available phosphorus and pH (P0.05). The comprehensive fertility index showed that: landscape forest unit subordinate forest = farmland shelterbelt road forest, green park Chaoyang district, Nanguan district, Erdao district, Kuancheng 1, ring 3, ring 4, ring 2, ring 4 According to the above results, we can take some measures such as loose soil, litter retting fertilizer, nitrogen and phosphorus organic fertilizer to control potash fertilizer, planting nitrogen-fixing and low phosphorus tolerant plants to promote urban forest construction in Changchun and enhance the ecological service function of urban vegetation.
【作者单位】：东北林业大学森林植物生态学教育部重点实验室;城市森林与湿地学科组中国科学院湿地与环境重点实验室中国科学院东北地理与农业生态研究所;
【基金】：中国科学院重点部署资助项目(KFZD-SW-302-04);中国科学院百人计划资助项目(Y3H1051001) 黑龙江省杰出青年资助项目(JC201401) 中央高校基本科研业务费专项资金项目(2572014EA01) 国家自然科学基金(31670699)
【分类号】：S714.8

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