| 氮磷钾肥对紫云英产量及养分积累的影响 |
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| 引用本文： | 刘威,鲁剑巍,苏伟,鲁明星,吴翠霞,曹卫东.氮磷钾肥对紫云英产量及养分积累的影响[J].中国土壤与肥料,2009(5). |
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| 作者姓名： | 刘威 鲁剑巍 苏伟 鲁明星 吴翠霞 曹卫东 |
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| 作者单位： | 刘威,鲁剑巍,苏伟(华中农业大学资源与环境学院,湖北,武汉,430070);鲁明星(湖北省土壤肥料工作站);吴翠霞(中国农业科学院农业环境与可持续发展研究所,北京,100081);曹卫东(中国农业科学院农业资源与农业区划研究所,北京,100081,湖北,武汉,430070) |
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| 基金项目： | 国家"十一五"科技支撑计划重点项目，公益性行业(农业)科研专项经费项目 |
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| 摘 要： | 通过田间试验,研究了NPK肥对紫云英生长、产量及养分积累的影响.结果表明,NPK配施能促进紫云英生长,显著提高产量和养分积累量.NPK处理(施N 75 kg/hm2 、P2O5 60 kg/hm2和K2O 60 kg/hm2)的紫云英茎数、株高和每茎复叶数分别是不施肥处理的3.77、1.81和1.60倍,是施PK处理的2.19、1.23和1.16倍,是施NK处理的2.11、1.16和1.11倍,是施NP处理的1.44、1.19和1.16倍.NPK配施的鲜草产量分别比不施肥、PK配施、NK配施及NP配施处理增加26.47、14.22、7.18和10.74 t/hm2.不同施肥处理都能使紫云英的养分积累量显著提高,其中NPK配施处理的紫云英地上部N、P2O5、K2O和C的积累量最大,分别是不施肥处理的3.66、3.27、2.85和2.80倍.试验结果说明,合理施用N、P、K肥能明显促进紫云英的生长,提高产量和养分积累量,有利于提高紫云英种植效益.
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| 关 键 词： | 紫云英 施肥 生长 产量 养分积累 |
Effect of N,P,K fertilization on milk vetch growth,yield and nutrient accumulation |
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| Abstract: | The effect of nitrogen (N) , phosphors (P) and potassium (K) application on growth, yield and nutrient accumulation of milk vetch (Astragalus sinicus L. ) were studied in this experiment Results showed that combined application of N, P and K fertilizers could increase milk vetch in growth, yield and nutrient accumulation. The stem number of NPK (75 kg/hm~2 N, 60 kg/hm~2 P_2 O_5, 60 kg/hm~2 K_2O) treatment were 3.77, 2. 19, 2. 11, 1.44 times, plant height of NPK treatment were 1. 80, 1.23, 1.16, 1. 19 times, compound-leaf number of NPK treatment were 1.60, 1.16, 1.11, 1. 16 times of those of no fertilizer, PK, NK, NP treatments, respectively. The fresh forage yield of NPK treatment increased by 26.47, 14.22, 7. 18 and 10.74 t/hm~2 more than those of no fertilizer, PK, NK, NP treatments, respectively. The results also showed that NPK combination significantly improved N, P_2O_5, K_2O and C accumulation in milk vetch, and total uptake a-mount of N, P_2O_5, K_2O and C were 3. 66, 3. 27, 2. 85 and 2. 80 times of those in no fertilizer treatment, respectively. |
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| Keywords: | milk vetch (Astragalus sinicus L ) fertilization growth yield nutrient accumulation |
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