Effects of Time and Pattern of Deep Tillage(Subsoiling)on Soil Physical Properties and Maize Yield
Five treatments,namely,rotary tillage in autumn +no-tillage in summer (ART +SNT,CK), subsoiling in autumn+no-tillage in summer (ASS+SNT),deep mouldboard ploughing in autumn+no-tillage in summer (ADT + SNT),deep mouldboard ploughing in autumn and sublevel subsoiling in summer(ADT+SSSS),deep mouldboard ploughing in autumn and lateral subsoiling in summer(ADT+SSSL)were carried out to investigate the effect of time and pattern of deep tillage(subsoiling)on soil density,soil bulk density,soil moisture,dry matter accumulation and yield of maize,and identify the suitable tillage system in lime concretion black soil.The results showed that,ASS+SNT,ADT+SNT and ADT+SSS significantly reduced soil density and soil bulk density,increased soil moisture,promoted plant growth of maize,thus increased maize yield. The improvement effects on soil character of ADT +SSS treatment was better than single deep tillage in autumn.In the five treatments,the improvement effects on soil physical characters of ADT+SSSL treatment was the best,and the dry matter accumulation and yield were the highest. The soil penetration resistance and soil bulk density of ADT +SSSL treatment were 29.0% and 12.7%,respectively,lower than that of ART +SNT treatment,while the soil moisture and maize yield of ADT+SSSL treatment were 7.8% and 15.5%,respectively,higher than that of ART+SNT treatment.In the five treatments of different deep tillage time and pattern,the improvement effects on soil physical characters and maize yield of ADT + SSSL treatment was the highest. Thus,the deep mouldboard ploughing in autumn combined with lateral subsoiling in summer was the suitable time and pattern of deep tillage in lime concretion black soil.
Deep tillage(subsoiling) timeDeep tillage(subsoiling) patternSoil densityMaizeYield
国家科技期刊平台
NSTL
万方数据
维普
