Effects of Nitrogen and Phosphorus Regulation on Alfalfa Nitrogen Accumulation and the Nitrogen and Phosphorus Nutrients of Soil

doi:10.11733/j.issn.1007-0435.2016.01.009

Acta Agrestia Sinica ›› 2016, Vol. 24 ›› Issue (1): 61-68.DOI: 10.11733/j.issn.1007-0435.2016.01.009

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Effects of Nitrogen and Phosphorus Regulation on Alfalfa Nitrogen Accumulation and the Nitrogen and Phosphorus Nutrients of Soil

ZHANG Jin-xia^1,2, LIU Xiao-jing^1,2, HAO Feng^1,2, FAN Jun-jun^1,2, FENG Bo-zheng^1,2, QI Peng³

1. College of Pratacultural Science, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China;
2. Key Laboratory of Grassland Ecosystem, Ministry of Education/Sino-U.S. Centers for Grazingland Ecosystem Sustainability, Lanzhou, Gansu Province 730070, China;
3. College of Resource and Environment, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China

Received:2014-11-21 Revised:2015-06-08 Online:2016-02-15 Published:2016-04-26

氮磷调控对紫花苜蓿氮积累与土壤氮磷营养的影响

张进霞^1,2, 刘晓静^1,2, 郝凤^1,2, 范俊俊^1,2, 冯博政^1,2, 齐鹏³

1. 甘肃农业大学草业学院, 甘肃兰州 730070;
2. 草业生态系统教育部重点实验室/中美草地畜牧业可持续发展研究中心, 甘肃兰州 730070;
3. 甘肃农业大学资源与环境学院, 甘肃兰州 730070

通讯作者: 刘晓静
作者简介:张进霞(1987-),女,甘肃白银人,硕士研究生,主要从事牧草与草坪营养生理研究,E-mail:zhangjx5335@sina.com
基金资助:
国家自然科学基金项目(31460622);公益性行业(农业)科研专项(201403048-8)资助

Abstract

Abstract:

The ‘Gannong No.3’ variety of alfalfa planted in the Northwest semi-arid areas with different nitrogen and phosphorus levels was selected as the studied material in the second year. The yield, crude protein content and nitrogen accumulation of alfalfa and alkali-hydrolyzable nitrogen, phosphorus content and dynamic changes of soil, as well as the correlation of soil urease, soil available nutrient, the dynamic change of alkaline phosphatase activity, enzyme activity with the total protein production and yield of alfalfa were investigated. The results showed that nitrogen fertilizer could significantly improve the yield and crude protein content of alfalfa ‘Gannong No.3’ variety. And the nitrogen and phosphorus contents of soil, soil urease and alkaline phosphatase activities increased after fertilization. The effects of nitrogen and phosphorus fertilizer (NP) on the nitrogen and phosphorus contents of soil were greater than single application. Correlation analyses showed that ‘Gannong No.3’ alfalfa yield (y) had significant positive correlation with soil nitrogen content (x₁), urease activity (x₂), phosphorus content (x₃) and alkaline phosphatase activity (x₄). The linear regression equation was y= -2976.953 +53.577 x₁ +216.824 x₂ +58.534 x₃ +12.145 x₄(R²= 0.874^**).

Key words: Alfalfa, Nitrogen accumulation, Soil nutrient, Soil enzyme activity

摘要：

在西北半干旱地区进行不同氮磷水平对种植第2年的‘甘农3号’紫花苜蓿(Medicago sativa‘Gannong No.3’)产量、粗蛋白含量及氮积累的影响和紫花苜蓿草地土壤碱解氮、有效磷含量及其动态变化、土壤脲酶、碱性磷酸酶活性及其动态变化、土壤速效养分及酶活性与紫花苜蓿产量和蛋白总量的相关性研究。结果表明:氮磷肥能显著提高‘甘农3号’紫花苜蓿产量和粗蛋白含量,施肥可提高土壤碱解氮、有效磷含量,增强土壤脲酶和碱性磷酸酶活性,其中氮磷配施(NP)作用明显大于氮、磷肥单施。相关性分析表明,‘甘农3号’紫花苜蓿产量(y)与各层土壤碱解氮含量(x₁)、脲酶活性(x₂)、有效磷含量(x₃)及碱性磷酸酶活性(x₄)均呈显著或极显著正相关关系,与土壤碱解氮、有效磷含量的相关性最好,符合线性回归方程y=-2976.953+53.577x₁+216.824x₂+58.534x₃+12.145x₄(R²=0.874^**)。

关键词: 紫花苜蓿, 氮积累, 土壤养分, 土壤酶活性

CLC Number:

S541.9

ZHANG Jin-xia, LIU Xiao-jing, HAO Feng, FAN Jun-jun, FENG Bo-zheng, QI Peng. Effects of Nitrogen and Phosphorus Regulation on Alfalfa Nitrogen Accumulation and the Nitrogen and Phosphorus Nutrients of Soil[J]. Acta Agrestia Sinica, 2016, 24(1): 61-68.

张进霞, 刘晓静, 郝凤, 范俊俊, 冯博政, 齐鹏. 氮磷调控对紫花苜蓿氮积累与土壤氮磷营养的影响[J]. 草地学报, 2016, 24(1): 61-68.

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Effects of Nitrogen and Phosphorus Regulation on Alfalfa Nitrogen Accumulation and the Nitrogen and Phosphorus Nutrients of Soil

氮磷调控对紫花苜蓿氮积累与土壤氮磷营养的影响

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