宁夏工程技术2024，Vol.23Issue(2)：139-145,7.
基于回归模型的水肥耦合对枸杞根区土壤酶活性的影响研究
Study on Effect of Water and Fertilizer Coupling on Soil Enzyme Activity in The Root Zone of Wolfberry Based on Regression Model
摘要
Abstract
To investigate the effects of water and fertilizer coupling on soil urease and alkaline phosphatase activities in the root zone of wolfberry in the semi-arid region of Ningxia,a drip-irrigated wolfberry field experiment was conducted with three irrigation levels(65%ET0,85%ET0,105%ET0)and three fertilization levels(N-P2O5-K2O:165-60-105 kg/hm2,210-75-135 kg/hm2,255-90-165 kg/hm2).A biased regression analysis model was used to elucidate the extent and mechanisms of the effects of different water and fertilizer coupling on soil urease and alkaline phosphatase activities in the root zone of wolfberry.The results showed that the single factor was better correlated with soil urease activity in the root zone of wolfberry from 20 to 40 cm and with alkaline phosphatase activity in the soil from 0 to 20 cm,and the order of influence was X3(phosphorus application)＞X2(nitrogen application)＞X4(potassium application)＞X1(irrigation application).The interaction factors correlated well with the soil urease activity in the 0 to 40 cm soil layer in the root zone of wolfberry,and the order of their effects in the 0 to 20 cm soil layer and 20 to 40 cm soil layer were X1X3＞X1X2＞X1X4＞X2X3＞X3X4＞X2X4,X2X3＞X3X4＞X2X4＞X1X3＞X1X2＞X1X4,respectively,all showing positive effects.Under the experimental conditions,the optimal drip irrigation water and fertilizer combinations to ensure soil urease and alkaline phosphatase activity in the root zone of wolfberry in the semi-arid region of Ningxia were:irrigation volume 2 864.54 to 3 598.84 m3/hm2,N application 231.57 to 250.84 kg/hm2,P application 80.58 to 90.79 kg/hm2,and K application 147.16 to 160.02 kg/hm2.关键词
水肥耦合/枸杞/脲酶/碱性磷酸酶/回归模型Key words
water and fertilizer coupling/wolfberry/urease/alkaline phosphatase/regression model分类
农业科学引用本文复制引用
韩雨禄,尹娟,马正虎,孙富斌,范家杨..基于回归模型的水肥耦合对枸杞根区土壤酶活性的影响研究[J].宁夏工程技术,2024,23(2):139-145,7.基金项目
宁夏自然科学基金重点项目(2023AAC02022) （2023AAC02022）
宁夏高等学校一流学科建设(水利工程)项目(NXYLXK2021A03) （水利工程）
