摘要
【目的】蒙辽农牧交错区是我国北方农牧交错区的重要组成部分,也是辽宁地区商品粮基地与重工业生产基地的生态屏障,玉米是该地区主要农作物,在粮食生产中占有重要地位。【方法】本文以蒙辽农牧交错区玉米为研究对象,分析水浇和地膜覆盖两种种植方式下玉米各器官C、N含量的差异。【结果】2种种植方式下均是玉米茎的C含量最高,根的C含量最低;玉米叶和穗的N含量较高,根的N含量较低;玉米根、茎的C/N较高,叶的C/N较低。2种种植方式比较:水浇地玉米叶的C含量显著高于地膜覆盖;玉米茎的N含量极显著低于地膜覆盖;玉米茎和叶的C/N均显著高于地膜覆盖;土壤有机质显著低于地膜覆盖。【结论】相比于水浇地,地膜覆盖的种植方式可更有效的保持土壤养分,减少水资源的浪费,也有利于提高玉米的品质及产量。
【Objective】The agro-pastoral ecotone at Inner Mongolia and Liaoning border is an important part of the farming-pastoral ecotone in northern China,and it is also the ecological barrier of the commodity grain base and heavy industry production base in Liaoning.【Method】Maize was the main crop in this area and play an important role in grain production.In this paper,the maize in the agro-pastoral ecotone at Inner Mongolia and Liaoning border was used as the research object,and the differences of C and N contents in various organs of maize under the two methods of irrigating and mulching were analyzed.【Result】Under the two planting methods,the C content of the stem was the highest and the C content of the root was the lowest;The N content of leaves and ears was higher,the N content of roots was lower;the C/N of roots and stems was higher,and the C/N of leaves was lower.Compared the two planting methods:The C content of leaf in the irrigated land was significantly higher than that in the mulched land;the N content of the stem was significantly lower than that in the mulched land;The C/N of stem and leaf was significantly higher than that in the mulched land;The soil organic matter was significantly lower than that in the mulched land.【Conclusion】Comparing with irrigated land,the mulching method can more effectively maintain soil nutrients,reduce water waste and also improve maize quality and yield.
作者
徐媛
鲍雅静
李政海
陈佳
张靖
姚毅恒
赵琪茉
XU Yuan;BAO Ya-jing;LI Zheng-hai;CHE Jia;ZHANG Jing;YAO Yi-heng;ZHAO Qi-mo(College of Environment and Resources,Dalian Minzu University,Liaoning Dalian 116600,China)
出处
《西南农业学报》
CSCD
北大核心
2020年第8期1736-1740,共5页
Southwest China Journal of Agricultural Sciences
基金
国家重点研发计划(2016YFC0500707,2016YFC050050302)
中央高校基本科研业务费专项资金生态学科团队资助项目
辽宁省科学事业公益研究基金(2015003010)。
关键词
蒙辽农牧交错区
玉米
碳氮含量
种植方式
Agro-pastoral ecotone at Inner Mongolia and Liaoning border
Maize
Carbon and nitrogen content
Planting method
