Effects of Different Tillage Ways on Seedling Growth of Maize and Soil Physical Properties in Mollisol Region

doi:10.7668/hbnxb.2018.04.032

Abstract

Abstract: In order to solve the problem of low soil depth and it causes the damage to the physical properties of the plough layer in Northeast China. The effect of treatment including four tillage methods, Deep mold-board tillage (DN), No-tillage (NN), Rotary tillage (RN)and Subsoiling tillage (SN)on the soil moisture, soil temperature, soil compaction, and corn growth were studied to investigate the effect of soil physical properties on the root growth and thus the corn growth. Soil compaction increaseded sharply from soil (0-22.5 cm).In 2016, subsoiling reduced soil compaction treatment NN increased the soil compaction significantly with a maximum of 314.6 kPa respectively, SN soil compaction decreased the maximum value of 220.8 kPa. In 2017, NN increased, soil compaction maximum value was 489.3 kPa, SN decreased, soil compaction maximum value was 197.3 kPa.Compared with the treatment DN, in 2016, compared with DN, the water content of the plough layer (0-20 cm)was DN > RN > NN > SN, and the storage capacity of SN was 0.085 percentage points lower than DN. In 2017, NN increased the water storage of plough layer (0-20 cm)by 0.036 percentage points, SN was 0.066 percentage points lower than DN. Soil temperature of treatment NN dropped by 0.7℃ in 2016 and 1.5℃ in 2017. Compared with treatment DN, corn plant features of treatment SN, root length, root volume, root surface area and root dry weight showed an increasing trend by 4.54%, 19.21%, 18.57%, 14.12% respectively. Compared with DN, the root length and root dry weight of SN increased by 0.58 cm and 0.40 g in 2017.The 2016 data linear analysis showed that, maize seedling root length showed a negative linear relationship with the moisture, dry matter weight showed a negative linear relationship with the compactness, but showed the positive linear relationship with the soil temperature, the compactness had a strong linear correlation with dry matter formation in maize seedling stage. In summary, SN can reduce soil compaction, promote the growth of maize root, favorable yield formation, NN can improve the compaction and reduce the temperature, which is not conducive to the accumulation of dry matter and the formation of yield in the seedling stage of maize.

Key words: Tillage managements, Physical property, Maize growth, Mollisol

CLC Number:

S152
S184

GU Siyu, ZHU Yuwei, GUO Xingjun, CAI Yuetong, WU Shuai, ZHANG Zehui, ZHANG Huihui. Effects of Different Tillage Ways on Seedling Growth of Maize and Soil Physical Properties in Mollisol Region[J]. Acta Agriculturae Boreali-Sinica, 2018, 33(4): 226-231. doi: 10.7668/hbnxb.2018.04.032.

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