| 方凯凯,张玉岱,李树,王志康,杜毅飞,李会科.渭北果园生草生物量与土壤养分因子的关系[J].干旱地区农业研究,2016,34(5):172~179 |
| 渭北果园生草生物量与土壤养分因子的关系 |
| Relationship between orchard herbage biomass and soil nutrient factors in Weibei |
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| DOI：10.7606/j.issn.1000-7601.2016.05.26 |
| 中文关键词: 果园生草 养分因子 生草生物量 通径分析 |
| 英文关键词:orchard herbage nutrient factors herbage biomass path analysis |
| 基金项目:国家自然科学基金（31570623）；“十二五”国家科技支撑计划（2014BAD16B06）；国家现代农业产业技术体系项目(CARS-28)；公益性行业专项子专题（农业）（K312021109）；陕西省科技统筹创新（2016KTCQ02-24） |
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| 中文摘要: |
| 果园生草技术作为一种先进的果园管理模式，能够改善土壤的理化性状。采用Person相关性和通径分析方法，对苹果园清耕、苹果/白三叶(Trifoliurn repens L.)、苹果/红三叶(Trifolium pretense)、苹果/小冠花(Coronilla varia L.)、苹果/鸡脚草(Dactylis glomerata L.)、苹果/百脉根(Lotuscorniculatus)间作6种管理模式下生草生物量和土壤养分因子进行了研究，探讨了生草生物量与土壤养分因子的关系，以期为果园生草的合理选择与有效管理提供参考。结果表明：5种生草的总生物量都介于150～300 g·m-2，小冠花的总生物量最大，而白三叶最小，具体顺序为：小冠花>百脉根>鸡脚草>红三叶>白三叶。通径分析结果表明，土壤肥力因子对生草生物量的直接作用系数大小顺序为容重>全氮>速效钾>有机碳>硝态氮>铵态氮>速效磷，土壤容重和全氮的直接和间接通径系数较大（分别为0.847和0.917），是影响生草生物量最主要的因素，速效钾和有机碳是影响生草生物量的次要因子，而硝态氮、铵态氮和速效磷对生草生物量的作用很微弱。 |
| 英文摘要: |
| Interplanting herbage in orchard, an advanced orchard management mode, plays a significant role in improving orchard soil conditions. By using the methods of Person correlation and path analysis, this paper studied herbage biomass and soil nutrient factors under six species of management mode in apple orchards, including clear tillage mode, Trifoliurn repens L. mode, Trifolium pretense mode, Coronilla varia L. mode, Dactylis glomerata L. mode and Lotuscorniculatus mode. The relationship between herbage biomass and soil nutrient factors was thereby explored, providing a reference for the rational choice of orchard herbage planting and its effective management. The results showed that total biomass by five herbages was each between 150～300 g·m-2. Coronilla varia L. had the maximal total biomass. However, Trifoliurn repens L. resulted in the minimum. The order for biomass from high to low by different modes was Coronilla varia L.＞Lotuscorniculatus＞Dactylis glomerata L.＞Trifolium pretense＞Trifoliurn repens L. From the path analysis, the sequence of soil properties based on their direct effect on herbage biomass was: Bulk density＞Total N＞Available K＞Organic carbon＞Nitrate nitrogen＞Ammonium nitrogen＞Available P, meaning that direct (0.847 and 0.917, respectively) and indirect path coefficient of soil bulk density and total nitrogen were both the highest. These were the most important factors that affect herbage biomass. Available potassium and organic carbon were the secondly important factors that influence the herbage biomass, whereas nitrate nitrogen, ammonium nitrogen and available phosphorus had weak effects on herbage biomass. |
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