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中国农学通报

中国农学通报 ›› 2012, Vol. 28 ›› Issue (12): 48-53.doi: 10.11924/j.issn.1000-6850.2011-2968

所属专题： 棉花

• 农学 农业基础科学 • 上一篇    下一篇

长期连作对南疆棉田土壤物理性质影响的研究

万素梅 杲先民 刘晓红 胡守林   

  • 收稿日期:2011-10-13 修回日期:2012-01-14 出版日期:2012-04-25 发布日期:2012-04-25
  • 基金资助:

    国家自然科学基金

The Influence of the Continuous Cotton Cropping on the Physical Properties of Cotton Field in Different Cropping Systems in South Xinjiang

  • Received:2011-10-13 Revised:2012-01-14 Online:2012-04-25 Published:2012-04-25

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摘要：

为研究连作年限对棉田土壤物理性质的影响，以南疆连作3年、10年、15年的棉田为研究对象，对不同种植制度条件下棉田土壤物理性状各指标进行测定与分析。结果表明：棉花连作10年以后，水稻→小麦-绿肥→棉花种植制度棉田水分状况优于水稻→棉花种植制度；棉花连作3年、15年，与水稻→棉花种植制度相比，水稻→小麦-绿肥→棉花种植制度土壤容重分别减轻2.5%、2.8%；土壤孔隙度在不同连作年限之间存在极显著差异；从种植制度及连作年限对棉田土壤物理性质的影响综合分析，在南疆极端干旱条件下适应棉花长期连作的种植制度为水稻→小麦-绿肥→棉花，棉花连作年限不宜超过15年。

关键词: 东北连翘, 东北连翘, 樟子松, 红皮云杉, 林下土, 枯枝落叶

Abstract:

In order to determine the influence of the continuous cropping cotton on the physical properties of cotton field, continuous cotton cropping for 3 years, 10 years and 15 years respectively in south Xinjiang were studied by measuring and analyzing the physical properties of cotton field in different cropping systems which involved rice→wheat-green manure→cotton cropping system (R-W-G-C), and rice→cotton cropping system (R-C). The results showed that after 10 years of continuous cotton cropping the R-W-G-C was better than R-C in term of soil water regime. The soil bulk density of R-W-G-C system was reduced by 2.5%, 2.8% respectively after continuous cotton cropping for 3 and 15 years when compared with the R-C system; There was significantly difference in soil porosity among the different continuous cropping years at 0.01 level. It could be speculated that the cropping system which adapted to arid south Xinjiang area was the rice→wheat-green manure→cotton, and the continuous cropping years should be no more than 15 years.