| 王胜楠,邹洪涛,张玉龙,虞娜,张玉玲,范庆锋,黄毅.秸秆集中深还田两年后对土壤主要性状及玉米根系的影响[J].干旱地区农业研究,2015,33(3):68~71 |
| 秸秆集中深还田两年后对土壤主要性状及玉米根系的影响 |
| 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 |
| 中文关键词: 秸秆深还田 秸秆还田量 土壤理化性质 土壤含水量 玉米根系 |
| 英文关键词:straw deep returning amount of straw returning soil properties soil water content corn root system |
| 基金项目:国家973项目（2011CB100502）；农业部公益性行业专项（201303125）；国家科技支撑计划项目（2012BAD05B01，2011BAD09B02）；辽宁省科技农业攻关重大项目（2011213001） |
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| 中文摘要: |
| 采用翻转犁开沟的方式，在秋收后将秸秆集中深还田，探讨该模式实施两年后对土壤主要理化性质及玉米根系的影响。结果表明，随着秸秆还田量的增加，各层次土壤容重较CK处理降低了2.42%～10.67%；土壤含水量较CK处理增加了3.99%～14.68%；土壤有机质及全氮含量较CK处理均有显著提高，提高幅度分别为4.34%～97.97%、1.53%～44.36%；玉米根系总根长、总根表面积、总根体积以及平均根系直径均大于CK处理，以12 000 kg·hm-2处理效果最为显著。综上，秸秆集中深还田对降低土壤容重，提高土壤蓄水量、有机质和氮素含量，促进根系生长效应明显。 |
| 英文摘要: |
| 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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