...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Emirates Journal of Food and Agriculture >PLOUGH PAN IMPACTS MAIZE GRAIN YIELD, CARBON ASSIMILATION, AND NITROGEN UPTAKE IN THE CORN BELT OF NORTHEAST CHINA
【24h】

PLOUGH PAN IMPACTS MAIZE GRAIN YIELD, CARBON ASSIMILATION, AND NITROGEN UPTAKE IN THE CORN BELT OF NORTHEAST CHINA

机译：犁盘影响东北玉米带玉米粒产量，碳同化和氮吸收

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study aims to investigate the responses of carbon assimilation, grain yield, leaf stay-green rate, nitrogen uptake and distribution to soil compaction in the hard plow pan caused by repeated use of tractor-driven cultivator in Northeast China. The typical hybrid maize variety “Zhengdan 958” was exposed to two treatments of simulated plow pan (SP) and simulated subsoiling (SS, control) in pot experiments from 2012 to 2014. Compared with SS, SP significantly reduced net photosynthetic rate (Pn) during growth stage, leading to a decrease in dry matter accumulation (DMA) and grain yield (GY) in three consecutive experimental years. Leaf stay-green degrees (LSD), which showed a fast descending trend from 20 days after silking (DAS), significantly decreased in the later filling stage under SP treatment. The translocation e?ciency of the stored N (TEN) in stalk and leaf to the grain during pre-silking was enhanced, whereas leaf and grain N concentration (LNC/GNC), together with N accumulation amounts at maturity were significantly reduced under SP treatment. Also, plough pan reduced the N distribution to the organs of stalk, leaf and grain. In conclusion, subsoiling is a possible way to delay leaf senescence and achieve higher DMA and GY, and increased grain N in the corn belt of Northeast China.
机译：本研究旨在探讨在东北地区反复使用拖拉机耕种机后，硬耕犁中碳同化，谷粒产量，叶片绿化率，氮素吸收和分配对土壤压实的响应。在2012年至2014年的盆栽试验中，典型的杂交玉米品种“正单958”在模拟盆栽（SP）和模拟深松（SS，对照）的两种处理下暴露。与SS相比，SP显着降低了净光合速率（Pn）。在生长阶段，导致连续三个实验年的干物质积累（DMA）和谷物产量（GY）下降。叶片保持绿度（LSD）从出丝后20天（DAS）开始出现快速下降的趋势，在SP处理下的灌浆后期显着下降。在SP处理期间，茎和叶中的氮（TEN）在茎和叶中向谷物的转运效率提高，而叶片和谷粒中的氮浓度（LNC / GNC）以及成熟期的氮积累量显着降低。治疗。而且，犁盘减少了氮在茎，叶和谷粒器官中的分布。总之，深耕是延缓叶片衰老并获得更高的DMA和GY以及增加东北玉米带谷物N的可能途径。

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