GE Chang,LIU Huilin,ZHANG Shiwen,et al.Effects of Tillage Methods and Soil Types on Characteristics of Soil Compaction in Rainfed Farmland in Northern Anhui Province[J].Research of Soil and Water Conservation,2018,25(05):89-94.
耕作方式和土壤类型对皖北旱作农田土壤紧实度的影响
- Title:
- Effects of Tillage Methods and Soil Types on Characteristics of Soil Compaction in Rainfed Farmland in Northern Anhui Province
- 关键词:
- 土壤紧实度; 耕作方式; 土壤类型; 土壤容重与土壤含水量
- 分类号:
- S152
- 摘要:
- 为探明旱作区耕地质量变化，了解旱作区耕作管理方式对农田质量的影响，以皖北旱作区农田土壤为研究对象，研究分析了0-40 cm不同深度土壤紧实度梯度变化，揭示耕作方式、土壤类型、土壤容重和土壤含水量对土壤紧实度变化的影响。结果表明：从总体上来看，在0-40 cm土层深度下，土壤紧实度随深度的增加呈先增加后稳定的规律，20 cm以后土壤紧实度逐渐稳定；全区平均耕层深度为14.14 cm，平均耕层紧实度为573.63 kPa。从耕作方式来看，旋耕在30 cm之前各层土壤紧实度均大于翻耕地区，旋耕平均耕层深度为12.5 cm，翻耕平均耕层深度为16.8 cm，是旋耕的1.34倍。从土壤类型来看，不同土壤类型之间土壤紧实度的差异也很明显，潮土各土层平均紧实度均大于砂姜黑土，且随着深度的增加差距逐渐增大。从影响因素来看，土壤紧实度变化与土壤容重变化在水平和垂直方向上呈正相关；土壤紧实度变化与土壤含水量变化关系复杂，总体来看二者水平方向呈正相关，垂直方向呈现负相关。研究成果将为后续探究土壤结构变化过程及规律，旱作区耕层及犁底层变化迁移过程提供依据，对改善皖北旱作区农田质量状况提供数据理论支撑。
- Abstract:
- In order to find out the change of cultivated land quality in arid area, and to understand the influence of tillage management mode on farmland quality in dry farming area, dry farming area in Northern Anhui was taken as the research site, the gradient variation of soil compaction at different depths from 0 to 40 cm were studied, and the effects of tillage methods, soil types, soil bulk density and soil water content on soil compaction were revealed. The results show that:on the whole, in the 0-40 cm soil depth, soil compactness increased first and then stabilized with the increase of depth; below 20 cm, the soil compaction was gradually stabilized; the average topsoil depth was 14.14 cm, and the average degree of compaction was 573.63 kPa; from the point of view of farming methods, above 30 cm, the soil compaction of each layer of rotary tillage was greater than that of tillage, the average tillage depth was 12.5 cm, and the average tillage depth was 16.8 cm, which was 1.34 times of that of rotary tillage; from the perspective of soil types, the difference of soil compaction between different soil types was also obvious; the average compaction degree of soil layer in fluvo aquic soil was greater than that in lime concretion black soil, and with the increase of depth, the gap increased gradually; from the impact of factors, soil compaction was positively correlated with soil bulk density changes in both horizontal and vertical directions. The relationship between soil compaction and soil water content is complex. Overall, they are positively correlated in the horizontal direction, and negatively correlated in the vertical direction. The research results will provide a basis for the further study of the soil structure change process and laws, and the change process of the plough layer and plow bottom in arid land, and provide the theoretical support for improving the farmland quality in arid area in northern Anhui.
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备注/Memo
收稿日期:2017-09-25;改回日期:2017-11-16。
基金项目:国家重点研发计划项目（2016YFD0300801）；国家自然科学基金（41471186，41571217）
作者简介:葛畅(1993-),男,山东临沂人,在读硕士,研究方向:土壤肥沃耕层提升潜力与信息化管理。E-mail:564870911@qq.com
通讯作者:张世文(1978-),男,安徽淮南人,副教授,硕士生导师,研究方向:土壤过程定量化与时空异质性研究。E-mail:mamin1190@126.com