| 青藏高原高寒草甸草地NPK施肥组合研究 |
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| 引用本文： | 德科加.青藏高原高寒草甸草地NPK施肥组合研究[J].草原与草坪,2010,30(4):22-25. |
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| 作者姓名： | 德科加 |
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| 作者单位： | 青海省畜牧兽医科学院,青海,西宁,810016 |
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| 基金项目： | 青海大学中青年科研基金项目，国际合作项目"青海牧草养分管理与平衡施肥"，现代农业产业技术体系建设专项和不同区域草地承载力与家畜配置项目 |
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| 摘 要： | 采用三因子二次正交旋转组合回归设计,以N、P和K3种肥料为因子,在青海省玉树州高寒草地进行施肥试验。结果表明,缺乏N和P的高寒退化草地,不缺K,3个施肥因素对牧草产量的影响顺序为NPK,草地牧草产量(Y,kg/hm2)可用其与N(kg/hm2)和P(kg/hm2)间的二元二次方程Y鲜重=11 027+742 N+728 P-2 540 N2-624 P2-1 055 NP和Y干重=3 706+243 N+232 P-716 N2-201 P2-306 NP很好地估测;牧草产量较优施肥组合为251.80 kg N/hm2+131.82 kg P/hm2和269.69 kg N/hm2+119.36 kg P/hm2。
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| 关 键 词： | 高寒草甸 牧草产量 NPK施肥 回归分析 |
Study on NPK fertilizer application in alpine meadow on Qinghai-Tibetan Plateau |
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| DE Ke-jia.Study on NPK fertilizer application in alpine meadow on Qinghai-Tibetan Plateau[J].Grassland and Turf,2010,30(4):22-25. |
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| Authors: | DE Ke-jia |
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| Institution: | DE Ke-jia(Academy of Animal Husbandry and Veterinary Sciences of Qinghai Province,Xining 810016,China) |
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| Abstract: | The quadratic orthogonal regression design was used to determine the effects of N,P and K fertilizers in the alpine meadow in Yushu Prefecture of Qinghai Province.The results showed that the N and P in the alpine meadow was deficiency,but the K was sufficiency,the order of effect of 3 fertilizers on forage yield was NPK.The forage yield could be estimated by the equations：Y（fresh）=11 027＋742N＋728P-2540N2-624P2-1 055NP and Y（dry）= 3 706＋243N＋232P-716N2-201P2-306NP;the optimum fertilizer for forage yield in alpine meadow was 251.8-269.69 kg N/hm2 ＋ 119.36-131.82 P kg/hm2. |
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| Keywords: | alpine meadow forage yield NPK fertilizer regression analysis |
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