热带作物学报2024，Vol.45Issue(3)：632-640,9.DOI:10.3969/j.issn.1000-2561.2024.03.021
不同氮素形态对木薯生长及根际土壤养分与酶活性的影响
Effects of Different Nitrogen Forms on Cassava Growth,Rhizosphere Soil Nutrients and Enzyme Activities
摘要
Abstract
The effects of different nitrogen forms on the growth,rhizosphere soil nutrients and soil enzyme activities of cassava variety Huanan 9(SC9)were studied to provide theoretical basis for the scientific fertilization of cassava in Hunan Province.CK(no nitrogen fertilizer),T1(amide nitrogen-urea),T2(ammonium nitrogen-ammonium sulfate)and T3(nitrate nitrogen-calcium nitrate)were set in the study.The level of soil fertility was the same,and the application rate of nitrogen fertilizer was 180 kg/hm2.Effects of different nitrogen forms on plant height,stem diameter,soil nutri-ents,soil enzyme activity,yield and quality of cassava were studied.Compared with CK,different nitrogen treatments improved plant height,stem diameter,yield and quality of cassava.T2 had the highest plant height,stem diameter,yield,dry matter rate and starch content,which was significantly higher than that of CK by 13.51%,32.24%,61.72%,6.44%,19.86%.Nitrogen application changed the nutrient content of rhizosphere soil,and T2 had the best effect on the nutrient content of cassava rhizosphere soil.The contents of soil organic matter and alkali-hydrolyzable nitrogen in T2 were higher than those in the other treatments.The content of available potassium in T2 was higher than that in other treat-ments at root formation stage and root expansion stage.Compared with CK,nitrogen application increased soil enzyme activity in cassava rhizosphere.With the passage of the growth period,urease activity increased gradually,sucrase ac-tivity decreased at first and then increased,catalase and nitrate reductase activity increased at first and then decreased.Among them,the soil sucrase activity in T2 was the highest.Comprehensive analysis,in Hunan,the effects of different nitrogen forms on cassava growth and soil environment were different.Compared with CK,nitrogen application im-proved soil fertility,and then improved the growth of aboveground parts of cassava,thus improving the yield and quality of cassava.Among them,the application of ammonium nitrogen fertilizer is more beneficial to the growth and yield of cassava SC9.关键词
木薯/氮素形态/土壤养分/土壤酶活/产量/品质Key words
cassava/nitrogen form/soil nutrients/soil enzymatic activity/yield/quality分类
农业科技引用本文复制引用
姜舒雅,孙彬杰,林萱,刘文杰,朱杰辉,宋勇..不同氮素形态对木薯生长及根际土壤养分与酶活性的影响[J].热带作物学报,2024,45(3):632-640,9.基金项目
财政部和农业农村部国家现代农业产业技术体系建设项目(No.CARS-11-HNSY). （No.CARS-11-HNSY）
