| 养分和水添加对弃耕草地土壤无机磷组分的影响 |
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| 引用本文： | 张玉革,李欣悦,刘贺永,王金环,袁新,蔡江平,王汝振,姜勇. 养分和水添加对弃耕草地土壤无机磷组分的影响[J]. 应用生态学报, 2022, 33(2): 369-377. DOI: 10.13287/j.1001-9332.202202.010 |
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| 作者姓名： | 张玉革 李欣悦 刘贺永 王金环 袁新 蔡江平 王汝振 姜勇 |
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| 作者单位： | 1.沈阳大学环境学院, 区域污染环境生态修复教育部重点实验室, 沈阳 110044;2.中国科学院沈阳应用生态研究所, 额尔古纳森林草原过渡带生态系统研究站, 沈阳 110016 |
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| 基金项目： | 辽宁省重大科技攻关计划项目(2020JH1/10300006)和国家自然科学基金项目(31870441,31800398)资助。 |
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| 摘 要： | 合理的养分和水分管理措施是提高退化草地生产力和生物多样性的有效途径,但养分和水添加对弃耕草地土壤无机磷组分的影响研究较少.本文依托内蒙古多伦县2005年建立的养分(N∶ 10 g·m-2·a-1、P∶ 10g·m-2·a-1)和水分(植物生长季增水180 mm)添加田间试验,研究了表土(0～10 cm)无机磷组分及有效...
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| 关 键 词： | 弃耕草地 氮 磷 降水 无机磷组分 |
| 收稿时间： | 2021-05-07 |
Effects of nutrient and water addition on soil inorganic phosphorus fractions in an old-field grassland |
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| ZHANG Yu-ge,LI Xin-yue,LIU He-yong,WANG Jin-huan,YUAN Xin,CAI Jiang-ping,WANG Ru-zhen,JIANG Yong. Effects of nutrient and water addition on soil inorganic phosphorus fractions in an old-field grassland[J]. The journal of applied ecology, 2022, 33(2): 369-377. DOI: 10.13287/j.1001-9332.202202.010 |
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| Authors: | ZHANG Yu-ge LI Xin-yue LIU He-yong WANG Jin-huan YUAN Xin CAI Jiang-ping WANG Ru-zhen JIANG Yong |
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| Affiliation: | 1.Key Laboratory of Regional Pollution Environment and Ecological Restoration of Ministry of Education, College of Environment, Shenyang University, Shenyang 110044, China;2.Erguna Forest-Steppe Ecotone Ecosystem Research Station, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China |
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| Abstract: | Reasonable nutrient and water management is effective ways to improve productivity and biodiversity of degraded grasslands. However, little is known about the effects of nutrient and water addition on soil inorganic phosphorus (P) fractions in old-field grasslands. Based on a field experiment with nutrient addition (N: 10 g·m-2·a-1, P: 10 g·m-2·a -1) and water addition (180 mm water irrigated during plant growing season) in Duolun County, Inner Mongolia in 2005, we examined the changes of inorganic P fractions and Olsen-P contents in the topsoil (0-10 cm). Results showed that 11-year P addition significantly increased total inorganic P (TIP) content, and that exogenous P was mostly transformed into calcium phosphate (Ca-P: 62.6%-69.2%), and then into aluminium phosphate (Al-P: 19.9%-25.1%), ferric phosphate (Fe-P) and occluded P (O-P). Phosphorus incorporated with nitrogen (N) addition significantly increased Fe-P and Al-P contents by declining soil pH and activating Fe3+ and Al3+ in soil. Water addition alone significantly increased Fe-P, Al-P, and decalcium phosphate (Ca10-P) fractions, and the contents of Fe-P, Al-P, octacalcium phosphate (Ca8-P), and Ca10-P were greater in P incorporated with water treatment than in P addition alone. There was no difference of each inorganic P fraction between P incorporated with N and water treatment and P incorporated with N treatment. Phosphorus and P incorporated with N additions significantly increased soil Olsen-P content, while water addition significantly decreased soil Olsen-P content under P addition alone and P incorporated with N treatment. In the calcareous soils, calcium superphosphate addition could enhance soil inorganic P pool through increasing Ca-P fraction. |
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| Keywords: | old-filed grassland nitrogen phosphorus precipitation inorganic P fraction |
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