| 王根旺,宋曦.陇东黄土高原地区杏园土壤综合肥力对人工生草模式的响应及其环境解释[J].干旱地区农业研究,2018,36(4):29~39 |
| 陇东黄土高原地区杏园土壤综合肥力对人工生草模式的响应及其环境解释 |
| Response of integrated fertility of apricot orchard soil to artificial grass pattern and its environmental interpretation in the eastern Gansu Province of loess plateau |
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| DOI：10.7606/j.issn.1000-7601.2018.04.05 |
| 中文关键词: 杏园 人工生草 管理模式 土壤综合肥力 陇东黄土高原 |
| 英文关键词:apricot orchard artificial grass pattern soil integrated fertility eastern Gansu Province of loess plateau |
| 基金项目:甘肃省公益林木种质资源调查项目(No.GSJY[CD*2]ZC2016333) |
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| 中文摘要: |
| 为了揭示陇东黄土高原地区杏园土壤综合肥力对3种不同人工生草管理模式(模式A：杏树+黄花菜；模式B：杏树+紫花苜蓿；模式C：杏树+黄花菜+紫花苜蓿)及对照组CK（杏树+清耕)的响应机制，采用常规方法测定了土壤理化性质、酶活性及土壤微生物群落多样性等14项土壤环境指标。结果表明：土壤碱性磷酸酶和转化酶活性分别在模式A和C下活性最高,分别为18.18±0.51 μg·g-1·h-1和213.15±3.69 μg·g-1·h-1，而土壤脲酶则在模式B和C中活性最高,分别为25.52±0.79 μg·g-1·h-1和26.44±0.57 μg·g-1·h-1，土壤速效钾和速效磷含量在3个模式间无显著差异，但模式B(36.46±1.84 mg·kg-1)的土壤碱解氮含量最高；4种土壤微生物群落多样性指数在不同生草模式下均呈模式C>模式B>模式A>CK，其中Shannon-Wiener指数和Pielou 均匀度在模式B和模式C之间无显著差异。NMDS排序结果表明，影响杏树林不同生草模式土壤肥力差异的最主要环境因子是Patrick丰富度指数(r2=0.8489)和土壤脲酶(r2=0.8111)。方差分解结果表明，土壤微生物学特性、酶活性及理化特性的总叠加效应共同解释杏树根际土壤综合肥力变异的79%，而土壤酶活性与微生物学特性是影响土壤肥力变异的主要环境因子(41%)，土壤理化特性(3%)的独立效应对土壤肥力的影响要明显低于土壤酶活性(15%)与土壤微生物学特性(13%)。 |
| 英文摘要: |
| In order to reveal the response of integrated fertility of apricot orchard soil to three different artificial grasses patterns (Pattern A: Apricot + Lily; Mode B: Apricot + Purple Alfalfa; Mode C: Apricot + Lily + Purple Alfalfa; Control group CK: Apricot + clear tillage) in the eastern Gansu province of loess plateau, using conventional methods to determine the soil physical and chemical properties, enzyme activity and soil microbial community and other soil environmental indicators. The results showed that: the soil alkaline phosphatase and invertase activity in pattern A (18.18±0.51 μg·g-1·h-1) and C (213.15±3.69 μg·g-1·h-1) were the higher activity, while the soil urease in pattern B (25.52±0.79 μg·g-1·h-1) and C (26.44±0.57 μg·g-1·h-1) were demonstrated the higher activity. and the content of soil available potassium and available phosphorus had no significant difference among the three patterns but the soil alkalized nitrogen content in model B (36.46±1.84 mg·kg-1) was the highest; the trends of 4 kinds of soil microbial diversity index in different grass patterns was pattern C> pattern B> pattern A>CK , and Shannon-Wiener index and Pielou evenness had no significant difference between pattern B and pattern C; Nonmetric multidimensional scaling analysis sorting results showed that the soil integrated fertility difference were strongly affected by Patrick richness index (r2=0.8489,) and soil urease activity (r2=0.8111). Variance analysis revealed that 79% of the total soil integrated fertility variation in the rhizosphere soil of apricot orchard was explained based on the soil physicochemical properties, enzyme activity and soil microbial community properties. Soil enzyme activity and microbial community properties were the main environmental factors(41%) affecting the soil integrated fertility. Moreover, the independent effects of soil physical and chemical properties (3%),the impact on soil fertility was significantly lower than soil enzyme activity (15%) and microbiological properties (13%). |
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