种草对中低产田土壤的培肥效应研究

The Research of Increasing the Fertility Effect of Soil with Planting the Alfalfa on Middle and Lower Yield of Farmland

在大田条件下,以辽宁省朝阳地区主栽谷子品种朝谷6号为植物试材,以肥力较低的褐土为土壤试材,设草茬不施肥、非草茬施肥和非草茬不施肥3个处理,研究了种草对土壤理化性状、谷子生长发育和产量的影响。结果表明,与非草茬施肥和非草茬不施肥2个处理相比,种植3年以上苜蓿草的草茬土壤,在不施任何肥料的情况下,土壤理化性状有很大的改善,有机质含量增加,容重减小,含水量增加,耕层温度变化缓和;谷子株高、根长、叶片数等均有所增加;种植当年谷子的增产效果明显,草茬不施肥处理谷子产量较非草茬不施肥和非草茬施肥处理增产44.4%和16.8%。

In order to study the fertility effect of planting alfalfa on millet growing, three fertility treatments, namely, alfalfa stubble soil whitout fertilizer application, non alfalfa stubble soil with fertilizer application, and non-alfalfa stubble soil without fertilizer application were conducted to the millet eultivar of Chaogu No. 6 growing in the cinnamon soil with low fertility level. The result of these experiment indicate that the alfalfa stubble soil without fertilizer in which has been planted for over three years was good for the physical and chemical character of soil, procreate target and its yield of millet was better than the other two treatments.