• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International journal of soil science >Analysis of nitrogen dynamics and fertilizer use efficiency in rice using the nitrogen-15 isotope dilution method following the application of biogas slurry or chemical fertilizer.
【24h】

Analysis of nitrogen dynamics and fertilizer use efficiency in rice using the nitrogen-15 isotope dilution method following the application of biogas slurry or chemical fertilizer.

机译：施用沼气浆或化肥后，使用氮15同位素稀释法分析水稻中的氮动力学和肥料使用效率。

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

The fates of nitrogen-15 (15N)-labeled biogas slurry (BS) and chemical fertilizer (CF) applied to soil with low fertility cropped with rice were investigated. The 15N dilution method was used to estimate N uptake and recovery; potted soil was labeled with 1.0 atom % excess [15N] ammonium chloride ([15N]NH4Cl). Certain select soil characteristics were also measured in soil amended with the slurry to explain N losses. The values of the % N derived by fertilizer application to the plant exhibited significant differences among different plant parts. N uptake from the CF applied to rice grain, straw and the roots was significantly (p<0.05) higher than that from BS, but the highest proportion of N uptake by rice was from the soil. At harvest, an average of 6.2 and 13.2% of applied N remained in the soil treated with the CF and BS, respectively. Fertilizer use efficiency calculated by the 15N dilution method tended to be higher for CF than BS. A significant amount of N fertilizer (average: 30%) was apparently lost from the soil-plant system by ammonia (NH3) volatilization. Following BS application, the pH increased by 1 to 1.2 units in the top 5 cm of the soil, resulting in high NH3 volatilization in the first 2 days of the experiment. The NH3 volatilization accounted for the decrease in soil ammonium-N (NH4+-N) content.
机译：研究了氮15（15N）标记的沼液（BS）和化肥（CF）在水稻种植的低肥力土壤上的命运。 15N稀释法用于估算氮的吸收和回收率。盆栽土壤用1.0原子％过量的[15N]氯化铵（[15N] NH4Cl）标记。在用泥浆改良过的土壤中也测量了某些特定的土壤特性，以解释氮的损失。在植物的不同部位之间，施肥所产生的％N值显示出显着差异。施用到水稻籽粒，稻草和根部的CF吸收的N明显高于（BS）（p <0.05），但水稻吸收的N的比例最高。收获时，平均分别有6.2％和13.2％的施氮残留在CF和BS处理过的土壤中。通过15N稀释法计算出的CF肥料利用率往往比BS更高。氨（NH3）挥发显然从土壤-植物系统中损失了大量氮肥（平均：30％）。 BS施用后，土壤顶部5 cm的pH值增加了1到1.2个单位，导致在实验的前2天中NH3的挥发量很高。 NH3挥发导致土壤铵态氮（NH4 + -N）含量下降。

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