摘要
在大田条件下,研究了5种氮素形态配比(NH4+-N:NO3--N为0∶100、25∶75、50∶50、75∶25、100∶0,分别用N1、N2、N3、N4、N5表示)对冬小麦(强筋小麦郑麦366和弱筋小麦郑麦004)根际土蛋白酶、脲酶、蔗糖酶和淀粉酶活性的影响。结果表明,NH4+-N:NO3--N为25:75的N2处理可以有效提高郑麦366根际土的酶活性,N2处理蛋白酶、蔗糖酶和淀粉酶活性较N1处理分别提高19.85%、4.78%和15.92%,较N5处理分别提高57.28%、5.89%和25.16%。而NH4+-N:NO3--N为50:50的N3处理有利于郑麦004根际土酶活性的提高,N3处理蔗糖酶和淀粉酶活性较N1处理分别提高16.89%和11.01%,较N5处理分别提高8.06%和28.99%。综合分析表明,铵硝混施有利于冬小麦根际土酶活性的提高,说明施加不同形态配比的氮肥可以有效调控冬小麦根际土的酶活性,从而改善冬小麦生长的土壤环境。
Effects of five proportions of nitrogen forms （NH4＋-N：NO3--N were 0：100, 25：75, 50：50, 75：25, 100：0, denoted as N I ,N2, N3 ,N4 ,NS, respectively） on winter wheat （cv. strong gluten wheat Zhengmai 366 and weak gluten wheat Zhengmai 004） rhizosphere soil protease, urease, invertase and amylase activities were investigated under field condition.The results showed as following, N2 treatment （NH4＋-N：NO3-N was 25：75） could effectively improve the rhizosphere soil enzyme activities of Zhengmai 366.Compared with NI treatment, protease, invertase and amylase activities were improved by 19.85%, 4.78% and 15.92% in the N2 treatment. And compared with N5 treatment,they were improved by 57.28%, 5.89% and 25.16% in the N2 treatment.While the N3 treatment （NH4＋-N：NO3-N was 50：50） was more favorable to increase the rhizosphere soil enzyme activities of Zhengmai 004, compared with N 1 treatment , invertase and amylase activities were improved by 16.89% and 11.01% in the N2 treatment. And compared with N5 treatment, they were improved by 8.06% and 28.99% in the N2 treatment. Comprehensive comparison analysis showed that,different ratios of nitrogen forms can effectively regulated the soil activities in wheat＇s rhizosphere, and then improved the soil environment where the winter wheat would better growth and development.
出处
《广东农业科学》
CAS
CSCD
北大核心
2013年第13期68-71,共4页
Guangdong Agricultural Sciences
基金
河南省重点科技攻关项目(102102110030)
关键词
氮素形态
配比
冬小麦
根际土
土壤酶活性
nitrogen forms
ratio
winter wheat
rhizosphere soil
soil enzyme activity
