华北平原4种主要农作物非根际和根际土壤活性碳氮和酶活性特征
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摘要:
以两种豆科作物(大豆和花生)和两种非豆科作物(玉米和甘薯)为研究对象,对比研究不同作物非根际土和根际土无机氮、微生物量碳氮含量及与活性碳氮转化有关的酶活性的季节变化特征.结果表明:不同生长期内豆科作物根际土铵态氮和硝态氮含量显著高于非豆科作物;玉米生长季内非根际土硝态氮含量显著高于根际土,其他3种作物非根际土硝态氮含量小于根际土;4种作物根际土微生物量碳(MBC)含量显著高于非根际土,根际土微生物量氮(MBN)在苗期显著高于非根际土;作物非根际土铵态氮与硝态氮和蔗糖酶存在显著负相关关系;非根际土硝态氮与蔗糖酶、脲酶和β-葡萄糖苷酶活性存在显著正相关关系;根际土铵态氮和硝态氮与MBC,MBN、蔗糖酶、β-葡萄糖苷酶都存在显著正相关关系.
A filed experiment was conducted in Huojia County,Henan Province,two leguminous crops（soybean and peanut）and two non-legumes（maize and sweet potato）was selected to study the seasonal changes of inorganic nitrogen,microbial carbon（MBC）and microbial nitrogen（MBN）and the enzyme activities correlating with labile carbon and nitrogen.The results showed that ammonium nitrogen and nitrate nitrogen contents of leguminous crops were higher than two non-legumes in rhizosphere soil.The nitrate nitrogen content of corn in non-rhizosphere soil was higher than rhizosphere soil,however,the nitrate nitrogen content of other three crops in rhizosphere soil was higher than non-rhizosphere soil.The content of MBC of four corps in rhizosphere soil as a whole was higher than in non-rhizosphere soil during growing season,and the difference was significant except soybean in rapid growth period.The MBN of four crops in rhizosphere soil was higher than in non-rhizosphere soil in seeding stage.The ammonium nitrogen of non-rhizosphere soil exist significant negative correlation with nitrate nitrogen and invertase contents,the nitrate nitrogen of non-rhizosphere soil exist significant positive correlation with invertase,urease andβ-glucosidase activities;There was significant positive correlation between ammonium nitrogen and nitrate nitrogen contents of rhizosphere soil and MBC,MBN,urease andβ-glucosidase activities.
作者:
王温澎 邵云 李英臣 谷雪维 曹丽茹 位姗姗 上官鑫彦 朱瑞
Wang Wenpeng;Shao Yun;Li Yingchen;Gu Xuewei;Cao Liru;Wei Shanshan;Shangguan Xinyan;Zhu Rui(Life Science College,Henan Normal University,Xinxiang 453007,China)
机构地区:
betway官方app 生命科学学院
出处:
《betway官方app 学报：自然科学版》 CAS 北大核心 2018年第5期77-84,共8页
基金:
国家重点研发计划(2016YFD0300203-3) 国家自然科学青年基金项目(41601534) 河南省教育厅科学技术研究重点项目(17A180027)
关键词:
华北平原 根际土 无机氮 MBC MBN 酶活性
North China Plain rhizosphere soil inorganic nitrogen MBC MBN enzyme activities
分类号:
S158.3 [农业科学—土壤学]
