轮耕对麦田土壤容重和小麦根系发育的影响  

Effects of Different Patterns of Rotational Tillage on Soil Bulk Density in Wheat Field and Wheat Root Development

作　　者：蒋向[1,2] 贺德先[1] 任洪志 刘清瑞 胡敏[1] 

机构地区：[1]河南农业大学农学院,河南郑州450002 [2]河南省农业技术推广总站,河南郑州450002 [3]新乡县农技站,河南新乡453700

出　　处：《麦类作物学报》2012年第4期711-715,共5页Journal of Triticeae Crops

基　　金：河南省科技创新人才计划项目(104200510013);河南省重大科技攻关项目(102101110200);农业部公益性行业科研专项(200903010)

摘　　要：为给小麦生产中的合理轮耕提供参考依据,通过田间定位试验,研究了轮耕麦田土壤容重及小麦根系发育的变化。结果表明,与连续旋耕3年相比,旋耕2年后深耕处理降低了15～25cm土层土壤容重,对表层土壤容重影响相对较小,增加了不同层次土壤根量、生育中后期15～20cm土壤单株次生根数和根系活力。说明在黄淮平原当前普遍采用一年两熟种植制度和作物秸秆通过旋耕还田的耕作方式下,采取旋耕2年后深耕对于改善麦田土壤条件、促进小麦根系生长发育更为有利。Effects of different patterns of rotational tillage on soil bulk density in wheat field and wheat root development were studied by long-term fixed-position field experiments in Xinxiang, Henan. The results showed that, compared with the treatment of rotary tillage for 3 years, the treatment of deep plowing after rotary tillage for 2 years decreased the soil bulk density in 15 ~25 cm soil layerde- creased, and increased nodal roots per wheat plant, root biomass in soil of deeper layers, and root vig- or at middle and late growing stages. It indicated that the practice of deep plowing after rotary tillage for 2 years was favorable to both improvement of soil conditions and root development when both double-cropping system and the practice of returning crop straws to the field by rotary tillage were wide employed in the Huang-Huai Plains.

关 键 词：小麦 轮耕 土壤容重 根系发育 

分 类 号：S512.1[农业科学—作物学] S318