应用田口方法对西藏核桃苗期氮磷钾适宜用量的研究

采用L9(34)正交试验方法,研究尿素、过磷酸钙和氯化钾不同配比施肥对西藏1年生核桃苗高、地径、干重等形态指标的影响。使用田口方法对氮、磷、钾3个因素及水平进行优化分析,得到最佳的施肥方案,以试验A1B2C2处理效果最佳,即每平方米施入7.5 g的氮肥,30 g的磷肥,15 g的钾肥时,苗高24.9 cm,地径为5.3 mm,总干重为4.1 g,地上干重为3.42 g,地下干重为0.68 g,这时苗木高度适中,地径最粗,干物质量大,根系发达,苗木质量最好。

Study of N,P,K fertilizers in seedling stage of Juglans Regia in Tibet on Taguchi method

Using the orthogonal design for L9(34),fertilizer tests on different concentration ration of nitrogen,phosphorus and potash were studied during seedling stages of one-year-aged of Juglans Regia in Tibet.Taguchi method used in this paper these three important factors and levels were optimized to get the best fertilizer program,the treatment of experiment A1B2C2 was the best,the optimal fertilizing amount of N,P,K were 7.5,30,15 g/m2,the height was 24.9 cm,the basal diameter was 5.3 mm,the total dry weight wa...