摘要
[目的]研究渭北旱塬免耕结合不同覆盖对春玉米产量和土壤物理性状的影响,以期对该区农业生产提供理论依据。[方法]选取先玉335为供试材料,以传统耕作不覆盖为对照,通过大田试验测定和分析了免耕不覆盖、免耕秸秆覆盖、免耕地膜覆盖和免耕地膜秸秆双元覆盖下土壤容重、孔隙度、含水量以及水分利用效率的变化。[结果]免耕覆盖处理能够不同程度降低20~40 cm土层土壤容重,显著提高春玉米播前0~80 cm土层土壤含水量;免耕地膜秸秆覆盖和免耕地膜覆盖较对照春玉米播前0~300 cm土层土壤贮水量增加63.7和62.5 mm,水分利用效率提高69.7%和22.4%。[结论]渭北旱塬地区春玉米种植适宜免耕地膜秸秆双元覆盖的方式。
[Objective]To study the effects of no-tillage combined with different coverage on soil physical properties and maize yield in order to provide theoretical basis for the agricultural production. [Method]Xianyu 335 was used as tested material,and conventional tillage( CT) with no mulching was set as control check,a field experiment was carried out on dryland field of Weibei Highland,this research included five treatments,CT,NT( no-tillage with no mulching),NTS( no-tillage with straw),NTP( no-tillage with plastic),NTSP( no-tillage with straw and plastic). Soil bulk density,soil porosity,water content and water use efficiency( WUE) were measured. [Result]Soil bulk density of 20-40 cm soil layer were reduced inordinately and soil water content before spring maize sowing of 0-80 cm soil layer were enlarged significantly with no-tillage cover managements. The soil water storage pre-sowing of NTS and NTP were increased 63. 7 and 62. 5mm,the WUE were enlarged by 69. 7% and 22. 4% than CT,separately,and the difference was significant. [Conclusion] It is suitable for the cultivation of spring maize in the way of no-tillage with straw and plastic in Weibei Highland.
出处
《安徽农业科学》
CAS
2017年第27期142-145,共4页
Journal of Anhui Agricultural Sciences
关键词
玉米
免耕
产量
容重
孔隙度
水分利用效率
Corn
No-tillage
Yield
Soil bulk density
Soil total porosity
WUE
