| Effects of deeply and concentratedly returned straw on soil main properties and corn root system |
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| DOI：10.7606/j.issn.1000-7601.2015.03.11 |
| Key Words: straw deep returning amount of straw returning soil properties soil water content corn root system |
| Author Name | Affiliation | | WANG Sheng-nan | 沈阳农业大学土地与环境学院,农业部东北耕地保育重点实验室,土肥资源高效利用国家工程实验室, 辽宁 沈阳 110866 | | ZOU Hong-tao | 沈阳农业大学土地与环境学院,农业部东北耕地保育重点实验室,土肥资源高效利用国家工程实验室, 辽宁 沈阳 110866 | | ZHANG Yu-long | 沈阳农业大学土地与环境学院,农业部东北耕地保育重点实验室,土肥资源高效利用国家工程实验室, 辽宁 沈阳 110866 | | YU Na | 沈阳农业大学土地与环境学院,农业部东北耕地保育重点实验室,土肥资源高效利用国家工程实验室, 辽宁 沈阳 110866 | | ZHANG Yu-ling | 沈阳农业大学土地与环境学院,农业部东北耕地保育重点实验室,土肥资源高效利用国家工程实验室, 辽宁 沈阳 110866 | | FAN Qing-feng | 沈阳农业大学土地与环境学院,农业部东北耕地保育重点实验室,土肥资源高效利用国家工程实验室, 辽宁 沈阳 110866 | | HUANG Yi | 沈阳农业大学土地与环境学院,农业部东北耕地保育重点实验室,土肥资源高效利用国家工程实验室, 辽宁 沈阳 110866 |
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| Abstract: |
| Straw was deeply and concentratedly returned to field after harvest in fall by a turnover plow to furrow method. Based on this, the resulting effects over a two-year term on soil main physical and chemical properties and corn root system were investigated. The results indicated that with the increment of straw returned, the bulk density in each soil layer was reduced by 2.42%～10.67% and the water content of soil became increased by 3.99%～14.68%, compared with the control treatment. The contents of soil organic carbon and total nitrogen were significantly improved by 4.34%～97.97% and 1.53%～44.36%, respectively. The length, surface area, volume and average diameter of corn root system were all greater than the control treatment, reaching the most significant level with 12 000 kg·hm-2 treatment. In conclusion, straw deep returning had obvious effects on reducing soil bulk density, increasing water content, soil organic carbon and total nitrogen, and promoting corn root growth. |
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