共 6 条
[3]
土壤实验实习教程[M]. 东北林业大学出版社 , 陈立新编著, 2005
[4]
Influence of Phosphorus and Potassium on Alfalfa Yield, Taproot C and N Pools, and Transcript Levels of Key Genes after Defoliation[J] . Berg,W K,Cunningham,S M,Brouder,S M,Joern,B C,Johnson,K D,Volenec,J J.Crop Science . 2009 (3)
[5]
Alfalfa cultivar response to phosphorus and potassium deficiency: Elemental composition of the herbage[J] . D. W. James,C. J. Hurst,T. A. Tindall.Journal of Plant Nutrition . 1995 (11)
[6]
Effects of potassium top-dressing a low fertility silt loam soil.on alfalfa herbage yields and composition and on soil K Values .2 Smith,D. Agron.J . 1975