Effects of Different Nitrogen Fertilizer Treatments on Soil Enzymatic Activities in Mulberry Gardens

来源 :Agricultural Biotechnology | 被引量 : 0次 | 上传用户:xiaoyao984
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
[Objective]The present experiment was undertaken to investigate the effects of different nitrogen fertilizer application levels on soil enzymatic activities in mulberry gardens,thus providing reference for rational application of nitrogen fertilizer and production of high-quality mulberry leaves. [Method]Field experiments were conducted with three different nitrogen fertilizer application levels: N1(120.75 kg /hm2),N2(172.5 kg /hm2),and N3(207 kg /hm2). Activities of catalase,urease,acid phosphatase and invertase in soil applied with different amount of nitrogen fertilizer were determined to analyze the correlation between soil enzymatic activities and mulberry leaf yield. [Result]Activities of urease and invertase in soil were improved with the increasing application level of nitrogen fertilizer; activities of catalase and acid phosphatase reached the highest in treatment N2. Activities of invertase and urease in soil exhibited significant positive correlations; activities of invertase and phosphatase exhibited significant positive correlations; extremely significant positive correlations were found between mulberry leaf yield and activities of urease,phosphatase and invertase in soil. [Conclusion]Rationally applying nitrogen fertilizer can improve activities of invertase,phosphatase and urease in mulberry gardens; activities of urease and invertase in soil can be used as indicators to evaluate soil properties in mulberry gardens. [Objective] The present experiment was undertaken to investigate the effects of different nitrogen fertilizer application levels on soil enzymatic activities in mulberry gardens, thus providing reference for rational application of nitrogen fertilizer and production of high-quality mulberry leaves. [Method] Field experiments were conducted with three different nitrogen fertilizer application levels: N1 (120.75 kg / hm2), N2 (172.5 kg / hm2), and N3 (207 kg / hm2). Activities of catalase, urease, acid phosphatase and invertase in soil applied with different amount of nitrogen fertilizer were determined to analyze the correlation between soil enzymatic activities and mulberry leaf yield. [Result] Activities of urease and invertase in soil were improved with the increasing application level of nitrogen fertilizer; activities of catalase and acid phosphatase reached the highest in treatment N2. Activities of invertase and urease in soil exhibiting significant positive correlations; activities of invertas extremely and very positive correlations were found between mulberry leaf yield and activities of urease, phosphatase and invertase in soil. [Conclusion] Rationally applying nitrogen fertilizer can improve activities of invertase, phosphatase and urease in mulberry gardens; activities of urease and invertase in soil can be used as indicators to evaluate soil properties in mulberry gardens.
其他文献
随着我国工程建设行业的逐步发展,工程造价咨询行业的市场也逐步开拓,当前已经成为建筑行业中比较重要的产业。在本文中,我们将对工程造价咨询项目管理中存在的问题进行分析,
使科学技术成为生产力,就必须使科学技术同经济效益结合起来。网络计划时间——成本优化技术,充分体现了它同经济的紧密联系,是网络计划管理技术中的一个重要环节。网络计划
请下载后查看,本文暂不支持在线获取查看简介。 Please download to view, this article does not support online access to view profile.
随着国产300MW机组CFB锅炉的大量投产运行,冷态启动点火耗油量大的难点较为普遍,结合CFB锅炉结构、燃烧原理等特点,在2台300 MW机组CFB锅炉的几十次冷态启动过程中,进行了节
电力工程抗震研究是生命线地震工程的一项重要组成部分。过去,历次强震电力工程均遭到严重破坏,电力工程的破坏往往带来严重的次生灾害,这些次生灾害(例如火灾),直接威胁生
长沙矿山研究院与锡矿山矿务局研究试制成功的楔管式锚杆(简称“W—P”),综合了缝管式和楔缝式锚杆的优点。现已由长沙锚杆厂成批生产供冶金、煤碳、水电、军工、化工等地下
不等式是中学数学的重要内容,也是数学奥林匹克的热点,又是解数学竞赛题的重要工具.在近几年的数学竞赛中,出现了很多与不等式有关的竞赛题型,主要涉及以下几类不等式:数列不
在市场经济条件下,企业职工是企业改革的主体,企业的改革过程是解放和发展生产力的过程,也是职工群众自己解放自己的过程。因此,推进企业改革发展必须紧紧依靠职工群众,这是
Energy Daily,2013-07-19美国Lawrence Livermore国家实验室(LLNL)发布的美国最新能源图显示,2012年美国发电使用了较多的天然气、太阳能电池板和风力涡轮机,使用的煤炭量较
云南省乡镇企业协会和省乡镇企业家协会近日在裕安钢铁股份公司召开的会议上,参加会议的部分企业家,发出《云南省乡镇企业家和厂长经理行为规范的倡议书》。倡议人有:昆明呈