【摘要】 研究玉米秸秆全覆盖免耕对土壤性质的影响及在东北春玉米种植区的应用。结果表明,在播种前后,免耕较常规垄作可增加30%~78%土壤含水量,显著降低耕层土壤温度,增加表层0~20 cm土壤容重;秸秆全覆盖免耕较常规垄作极显著增加单位面积土壤内蚯蚓的数量和重量;免耕5年后,土壤有机质变化主要集中在表层,在0~5 cm,秸秆全覆盖免耕土壤有机质含量5年间增加了29.1%。实施秸秆全覆盖免耕可以达到土壤可持续发展,积温较低区域采取此耕作方式可适当降低秸秆覆盖量。更多还原

【Abstract】 The influence of no-tillage practice with corn stalk mulching to soil property and the feasibility of spring corn growing areas in the northeast of China was examined.The result showed that soil moisture of no-tillage without straw mulch(NT) and no-tillage with straw mulch(NTS) in topsoil increase more obvious than that of ridge tillage(RT).In sowing,compared with RT,NTS was 30%-78% higher.In terms of daily average temperatures in sowing,NTS significantly reduced topsoil temperature.For topsoil bulk density,compared with RT,NT and NTS increased soil bulk density in the soil layer of 0-20 cm.In terms of earthworm population,there were significantly increased in NTS.After five-year tillage,in the soil layer of 0-5 cm,soil organic matter content in NTS treatment increased by 29.1%.In the local experimental regional climate conditions NTS it is a best way to increase soil arability.So,to take this tillage may be appropriate to reduce the amount of stalk mulching in the lower cumulative temperature regions.更多还原