...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Science of the total environment >Soil carbon dioxide and methane emissions and carbon balance with crop rotation and nitrogen fertilization
【24h】

Soil carbon dioxide and methane emissions and carbon balance with crop rotation and nitrogen fertilization

机译：土壤二氧化碳和甲烷排放和碳平衡与作物旋转和氮肥

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

Quantifying soil CO_2 and CH_4 emissions and C balance under dryland cropping systems in arid and semiarid regions is needed to understand their contributions to climate change. The objective of this study was to examine the effect of crop rotation and N fertilization rate on soil CO_2 and CH_4 fluxes and C balance under dryland farming from 2012 to 2016 in the northern Great Plains, USA. Treatments were two crop rotations (continuous spring wheat [Triticum aestivum L.], CW; and spring wheat-pea [Pisum sativum L.], WP) and four N fertilization rates (0,50,100, and 150 kg N ha~(-1)) applied to spring wheat. The soil CO_2 flux peaked immediately after planting, fertilization, and intense precipitation (＞15 mm in a day) when the emissions varied among treatments. Treatment did not affect soil CH_4 uptake, except that the uptake varied with N fertilization rate in 2015-2016. Cumulative annual soil CO_2 flux was 35-55% greater with CW than WP at 50-150 kg N ha~(-1) in 2013-2014 and 2015-2016, but was 37% greater with WP than CW at 100 kg N ha~(-1) in 2014-2015. Mean cumulative soil CH_4, flux was 34% greater with CW than WP at 0 kg N ha~(-1), but was 16% greater with WP than CW at 150 kg N ha~(-1). Yield-scaled soil CO_2 and CH_4 fluxes were unaffected (P ＞ 0.05) by treatments, but varied among years.Carbon balance was negative and unaffected by treatments. Results showed that soil CO_2 emissions can be reduced by using legume-nonlegume crop rotation with reduced N fertilization rate with limited impact on soil CH_4 emissions. Dryland spring wheat-based cropping systems was a carbon source in the semiarid region.
机译：在干旱和半干旱地区中，需要量化土壤CO_2和CH_4在干旱和半干旱地区的旱地种植系统下的衡量和C平衡，以了解其对气候变化的贡献。本研究的目的是研究2012年至2012年在美国北大平原2012至2016年Dryland农业下土壤CO_2和CH_4助熔剂和C余量对土壤CO_2和CH_4助熔剂的影响。治疗是两种作物旋转（连续春小麦[Triticum aestivum L]，CW;和春小麦豌豆[Pisum Sativum L.]，WP）和四个施肥率（0.50,100和150公斤〜（ - 1））应用于春小麦。当治疗中的排放变化时，在种植，施肥和激烈的沉淀（每天> 15mm）后，​​土壤CO_2通量立即达到峰值。治疗不影响土壤CH_4摄取，除了2015 - 2016年的氮肥率变化。累积年度土壤CO_2助焊剂在2013-2014和2015-2016的50-150千克HA〜（-1）中的CW比WP为35-55％，但WP比100kg N HA的CW为37％ 〜（-1）2014 - 2015年。平均累积土壤CH_4，通过在0 kg n Ha〜（-1）下Cw的Cw比Wp为34％，但与150kg N Ha〜（-1）的Cw为16％。通过治疗，产量缩放的土壤CO_2和CH_4助熔剂未受影响（p> 0.05），但多年来变化。碳均衡是阴性的并且不受治疗的影响。结果表明，土壤CO_2排放可以通过使用豆类非肥作旋转，降低氮肥率，对土壤CH_4排放有限。基于Dryland Spring小麦的种植系统是半干旱区域的碳源。

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