特定土壤养分条件下新温185号核桃根施氮磷钾肥的产量效应  

Effects of Root Fertilizing with Urea,Calcium Superphosphate and Potassium Sulphate on Yield of Juglans regia 'Xinwen 185' under the Condition of Specific Soil Nutrient Contents

作　　者：常志帅 潘存德[1] 王世伟[1] 叶静[1] 肖冰[1] 努斯热提.托合提 

机构地区：[1]新疆农业大学林学与园艺学院/新疆教育厅干旱区林业生态与产业技术重点试验室,乌鲁木齐830052

出　　处：《新疆农业科学》2014年第8期1451-1456,共6页Xinjiang Agricultural Sciences

基　　金：新疆维吾尔自治区"十二五"重大科技专项课题(201130102-2)

摘　　要：【目的】通过肥料效应田间试验,检验特定土壤养分条件下根施氮(N)、磷(P)、钾(K)肥对新温185号核桃(Juglans regia‘Xinwen185’)的产量效应,以期为核桃生产园的施肥与土壤养分管理提供科学依据。【方法】采用"3414"肥料效应田间试验和多元线性逐步回归分析。【结果】新温185号核桃单株产量(G)以2为底的对数(log2G)同P肥与K肥的交互作用(P×K)、N肥的施用量(纯氮量,N)、N肥施用量的自乘(N×N或N2)存在极显著(P=0.002)的线性相关关系,即:log2G^=2.940 7-0.243 8P×K+0.077 2N-0.033 7N2。【结论】在土壤有效P、速效K含量处于中上水平及以上(有效P≥14.34 mg/kg,速效K≥77.31 mg/kg)的生产园,P肥与K肥的交互作用(P×K)对新温185号核桃的单株产量存在负效应。并且在特定的土壤养分(碱解N 77.69 mg/kg)条件下,当N肥施用量(纯氮量)小于1.145 4 kg/株时,N肥对新温185号核桃单株产量存在正效应,反之则存在负效应。【Objective】Through fertilizer effect field trials,the experiment aims at testing effects of root fertilizing with urea（CO（NH2）2;nitrogen（N） fertilizer）,calcium superphosphate（Ca（H2PO4）2;phosphate（P） fertilizer） and potassium sulphate（K2SO4;potash（K） fertilizer） on yield of Juglans regia ＇Xinwen185＇ under the condition of specific soil nutrient contents,with a view to providing a theoretical basis for the fertilization and the soil nutrient management in the walnut orchards. 【Method】Both of the ＇3414＇ fertilizer effect field trials and the multiple linear stepwise regression analysis were used. 【Result】The binary logarithm（log2G） of the yield per tree（G） of J. regia‘Xinwen 185＇had a highly significantly linear relationship（P = 0. 002） with the interaction of P fertilizer and K fertilizer（P × K）,the fertilizing amount of N fertilizer（pure N amount; N） and its square（N × N or N2）. The linear relationship was log2G^ = 2. 940 7-0. 2438 P × K ＋ 0. 077 2N-0. 033 7N2. 【Conclusion】The interaction effect of P fertilizer and K fertilizer（P × K）on the yield per tree was negative,if soil available P and available K contents were at the upper level or above（available P≥14.34 mg/kg,available K≥77.31 mg/kg） in the walnut orchards. The effect of N fertilizer on the yield per tree of J. regia ‘Xinwen 185＇was positive under the condition of specific soil nutrient contents（alkaline hydrolysis N =77.69 mg/kg） in the walnut orchards,if the fertilizing amount（pure N amount） per tree was less than 1. 145 4 kg;Otherwise,the effect was negative.

关 键 词：新温185号 N肥 P肥 K肥 土壤养分 产量 效应 

分 类 号：S664.1[农业科学—果树学]