...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Plant and Soil >Effects of biocides and rotation breaks on soil organisms associated with the poor early growth of sugarcane in continuous monoculture
【24h】

Effects of biocides and rotation breaks on soil organisms associated with the poor early growth of sugarcane in continuous monoculture

机译：连续单作中杀菌剂和旋转中断对与甘蔗早期生长不良有关的土壤生物的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Glasshouse and field experiments were conducted to determine the effects of biocides and rotation breaks on deleterious soil organisms associated with the poor early growth and subsequent yield decline of sugarcane grown in continuous monoculture. Fumigation of a soil that had been under sugarcane monoculture with minimal breaks for more than 30 years markedly improved the health and growth of the sugarcane sett and shoot root systems, increased the growth of the primary shoot and stimulated more and larger secondary shoots. It also reduced populations of culturable fungi in the rhizosphere of the sett roots and reduced colonization of the sett and shoot roots by lesion nematode (Pratylenchus zeae). Exposure of the developing sett root system for 14 days to mono-cultured sugarcane soil was sufficient to significantly retard subsequent plant growth. In field experiments, fungicide and nematicide (mancozeb + aldicarb), when applied together to land under sugarcane monoculture, was as effective as fumigation in improving early sugarcane growth and increasing sugarcane yields. Rotation breaks (alternate crops, sown pasture, bare fallow) that were in place for 54 months, increased sugarcane establishment and increased sugarcane yields to levels similar to that obtained following fumigation of land under sugarcane monoculture. Fumigation of land that had been under the rotation breaks gave plant growth responses that were in addition to that achieved by the breaks alone. A mancozeb + aldicarb treatment was as effective as fumigation in increasing sugarcane yields after a bare fallow break but accounted for only a portion of the fumigation response following the crop and pasture breaks. Improved plant nutrition may be a factor in the fumigation response following the crop and pasture breaks. Plant growth responses to fumigation and the manocozeb + aldicarb treatments that were manifested in final sugarcane yields (after one years growth) were evident as plant growth responses (sett root, shoot root and primary shoot dry weight) measured 54 days after planting. The experimental results support the concept that when sugarcane is grown as a monoculture, deleterious fungi and nematodes retard plant establishment and early plant growth and that this leads to reduced sugarcane yields.
机译：进行了温室和田间试验，以确定杀生物剂和旋转中断对有害的土壤生物的影响，这些有害生物与连续单培养中甘蔗的早期生长不良和随后的产量下降有关。在甘蔗单一栽培条件下进行了长达30多年的最小熏蒸处理后，熏蒸土壤可以显着改善甘蔗定植和枝条根系的健康状况和生长，增加初生苗的生长并刺激更多更大的次生苗。它还减少了定居根的根际中可培养真菌的种群，并减少了病虫线虫（Pratylenchus zeae）对定殖和芽根的定植。将发育中的沉降根系统暴露于单一培养的甘蔗土壤中14天，足以显着延迟后续植物的生长。在田间试验中，将杀真菌剂和杀线虫剂（曼考昔+涕灭威）一起施用于甘蔗单一栽培下的土地上，与熏蒸一样有效地改善了甘蔗的早期生长并提高了甘蔗的产量。持续了54个月的轮作中断（交替作物，播种的牧场，光秃的休耕地），增加了甘蔗的建立，并使甘蔗的单产提高到了与在甘蔗单一栽培下熏蒸土地后获得的水平相似的水平。轮作休息期间熏蒸的土地对植物的生长反应不仅是单独休息所获得的。在短暂休耕后，曼考布+涕灭威处理与熏蒸在提高甘蔗产量方面一样有效，但仅占作物和牧场休息后熏蒸响应的一部分。改善植物营养可能是农作物和牧场休息后熏蒸反应的一个因素。种植后第54天测得的植物生长响应（固定根，枝根和初生干重）表明，对熏蒸和manocozeb +涕灭威处理的植物生长响应表现在最终甘蔗产量（生长一年后）中。实验结果支持了这样的概念，即当甘蔗单株种植时，有害的真菌和线虫会阻碍植物的生长和植物的早期生长，从而导致甘蔗产量下降。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号