辽西地区垄作和平作保护性耕作方式比较研究

比较了平作和垄作下不同保护性耕作方式对土壤水分、温度和作物生长发育和产量的影响。结果表明,几种耕作方式中平作的平均产量都要高于垄作,其增产率在11.38%￣15.20%之间。在相同的垄作或平作方式下,不同的保护性耕作方式的增产幅度不同,其中秸秆还田增产幅度最大。平作方式的出苗率、叶面积指数、根干重和干物重都高于垄作,但不同的保护性耕作方式其各项指标变化有所不同。平作下保护性耕作方式的土壤含水量高于垄作;垄作方式有一定的增温效应,尤其在苗期的土壤表层。

Technology Effect Comparison of Conservation Tillage Systems under Ridge Plowing and Flat Breaking in Western Area of Liaoning Province

The influence of different conservation tillage systems under ridge plowing and flat breaking on soil moisture, temperature and crop growth and development and yield have been compared. The results showed that the average yield of ridge plowing was lower than that of flat breaking which could increase production to 11.38%~15.20% among different conservation tillage systems. Under the same ridge plowing or flat breaking, the increasing production extent was different, of which the system of straw returning to field was largest. The seedling rate, LAI, root dry weight and dry matter weight of flat breaking were higher than those of ridge plowing, but different conservation tillage systems have different changes. Soil moisture of conservation tillage systems under flat breaking was higher than ridge plowing, which could improve soil temperature, especially on soil layer during seeding.