...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nutrient Cycling in Agroecosystems >The trend of soil organic carbon, total nitrogen, and wheat and maize productivity under different long-term fertilizations in the upland fluvo-aquic soil of North China
【24h】

The trend of soil organic carbon, total nitrogen, and wheat and maize productivity under different long-term fertilizations in the upland fluvo-aquic soil of North China

机译：华北旱地潮土不同长期施肥下土壤有机碳，全氮，小麦和玉米的生产力变化趋势

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

Evaluating the effects of management practices on the soil organic carbon (SOC), total nitrogen (TN) and grain yields would be valuable to explain field-level variability in crop production. A 33-year field experiment on the fluvo-aquic soil of North China with six treatments in a wheat (Triticum aestivium L.)-maize (Zea mays L.) rotation was evaluated. The six treatments were: non-fertilization (CK), nitrogen (N), nitrogen-phosphorus fertilization (NP), nitrogen-phosphorus-potassium fertilization (NPK), manure and nitrogen fertilization (NM), and straw returned with nitrogen fertilizers (NS). The results showed that the content of SOC and TN significantly increased in NM treatment. Application of inorganic fertilizers had small influence on SOC, but SOC and TN increased significantly in NM treatment over the long-term experiment. Compared to control, grain yield of wheat and maize increased two times under all treatments. The highest grain yield was detected in NM and NPK treatments. However, wheat yield was not significantly different (P > 0.05) between control and N treatment. Grain yields were more than doubled under fertilization for both wheat and maize, with the highest yield under the NM and NPK treatments and the lowest under CK treatment for maize and N treatment for wheat. The NP fertilization had little effect on maize yield in long-term, suggesting that potassium was not the primary limiting nutrients in the study site. Statistical analysis indicated that maize yield was significantly correlated with SOC and TN, and wheat yield was significantly correlated with SOC only. However, the relationships were stronger with TN (r = 0.26-0.42) than SOC (r = 0.12-0.37), indicating the importance of maintaining TN in agricultural soils. There was a strong positive linear correlation between carbon sequestered and carbon input (r = 0.828, P 0.01) in the study site, indicating that the conversion rate of carbon input to SOC was 8.5 %. SOC did not reach the saturation in fluvo-aquic soil and have the potential to sequester more carbon.
机译：评估管理措施对土壤有机碳（SOC），总氮（TN）和谷物产量的影响，对于解释作物生产中田间水平的变化将是有价值的。对华北潮潮土进行了33年的田间试验，在小麦（Triticum aestivium L。）-玉米（Zea mays L.）轮作中进行了六种处理。这六种处理方法是：不施肥（CK），氮肥（N），氮磷肥（NP），氮磷钾肥（NPK），肥料和氮肥（NM）以及秸秆还田的氮肥（ NS）。结果表明，在NM处理中SOC和TN的含量显着增加。长期试验中，无机肥的施用对有机碳含量影响不大，但有机碳处理中有机碳和总氮含量显着增加。与对照相比，在所有处理下，小麦和玉米的谷物产量均增加了两倍。在NM和NPK处理中，谷物产量最高。然而，对照和氮肥处理之间的小麦产量没有显着差异（P> 0.05）。施肥后，小麦和玉米的单产均增加了一倍以上，其中NM和NPK处理的单产最高，而CK和CK处理的单产最低。长期而言，NP施肥对玉米产量影响不大，这表明钾不是研究地点的主要限制养分。统计分析表明，玉米单产与SOC和TN显着相关，而小麦单产仅与SOC显着相关。但是，与TN（r = 0.26-0.42）的关系比SOC（r = 0.12-0.37）的关系更强，表明在农业土壤中保持TN的重要性。在研究地点，固存的碳与碳输入之间存在强的线性正相关（r = 0.828，P <0.01），表明碳输入到SOC的转化率为8.5％。潮水土壤中的SOC尚未达到饱和，并且有可能吸收更多的碳。

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