| 不同耕作措施对东北玉米农田土壤物理性质的影响 |
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| 作者姓名： | 马星竹 边道林 郝小雨 唐晓东 周宝库 |
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| 作者单位： | 黑龙江省黑土保护利用研究院/黑龙江省土壤环境与植物营养重点实验室;黑龙江省农业科学院 |
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| 基金项目： | 黑龙江省农业科学院“农业科技创新跨越工程”专项(HNK2019CX1311);黑龙江省领军人才梯队后备带头人资助;黑龙江省现代农业产业技术协同创新体系项目;国家重点研发计划(2017YFD0300502). |
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| 摘 要： | 为了揭示耕作措施对东北玉米田土壤物理性质的影响,本研究进行了连续4年的田间定位试验,探明了深松(ST)、免耕(NT)以及传统耕作(CT)对东北玉米田土壤物理指标(土壤容重、土壤三相比、土壤结构指数以及颗粒组成)的影响.结果表明:与传统耕作相比,深松处理能够显著降低0～20 cm土层的土壤容重(P<0.05),下层土壤(...
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| 关 键 词： | 耕作 深松 土壤容重 土壤三相比 颗粒组成 |
Effects of different tillage systems on soil physical properties of corn field in Northeast China |
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| Authors: | MA Xingzhu BIAN Daolin HAO Xiaoyu TANG Xiaodong ZHOU Baoku |
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| Institution: | (Heilongjiang Academy of Black Soil Conservation and Utilization/Key Laboratory of Soil Environment and Plant Nutrition,Harbin 150086,China;Heilongjiang Academy of Agricultural Sciences,Harbin 150086,China) |
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| Abstract: | In order to understand the effects of tillage systems on soil physical properties of corn field in Northeast China,we conducted a field experiment for four consecutive years under three tillage treatments,i.e.subsoiling tillage(ST),no tillage(NT)and conventional tillage(CT),and analyzed soil physical parameters(soil bulk density,soil three-phase ratio,soil structure index and particle composition).The results showed that,compared with CT,ST significantly reduced the soil bulk density at 0~20 cm soil depth(P<0.05);while no significant difference existed between the treatments at 20~40 cm soil depth,and NT was with the maximum soil bulk density.ST decreased the proportion of solid phase and significantly increased the proportion of gas phase at 0~40 cm soil depth(P<0.05),while NT increased the proportion of solid phase but decreased the proportion of liquid phase at 20~40 cm soil depth.ST significantly improved the GSSI(Generalized Soil Structure Index)by 28.3%on average.In addition,the STPSD(Soil Three Phase Structure Distance)value of ST was 15.0,significantly lower than the other two treatments(18.4 and 17.7),indicating that the topsoil physical structure was closer to an ideal state;while no significant difference existed between NT and CT.ST increased the proportion of 0.002~0.2 mm grade particles at 0~40 cm soil depth,in the order of ST>NT>CT.Therefore,ST significantly changes soil structure into an ideal state,with great significance for improving soil fertility and ensuring food security. |
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| Keywords: | tillage subsoiling tillage soil bulk density soil three phase ratio particle composition |
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