• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文OA文献 >Effects of planting soybean in summer fallow on wheat grain yield, total N and Zn in grain and available N and Zn in soil on the Loess Plateau of China
【2h】

Effects of planting soybean in summer fallow on wheat grain yield, total N and Zn in grain and available N and Zn in soil on the Loess Plateau of China

机译：黄土高原夏季休耕大豆对小麦产量，小麦籽粒总氮和锌及土壤速效氮和锌的影响。

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Dryland wheat is the major contributor to wheat production in the world, where water deficiency and poor soil fertility are key factors limiting wheat grain yields and nutrient concentrations. A field experiment was carried out from June 2008 to June 2011 at Shilipu (latitude 35.12 degrees N, longitude 107.45 degrees E and altitude 1200m above sea level) on the Loess Plateau (a typical dryland) in China, to investigate the effects of rotation with soybean (Glycine max) green manure (GM) on grain yield, total N and total Zn concentrations in subsequent wheat (Triticum aestivum L), and on nitrate-N and available Zn in the soil. The benefits of crop rotation with soybean GM on wheat grain yields became more evident with time. In the second and third years, the grain yields of wheat rotated with soybean GM reached 4871 and 5089 kg ha(-1) at the 108 kg N ha(-1) rate. These yields were 21% and 12% higher than the highest yields of wheat under a fallow-winter wheat (RV) rotation. Rotation with soybean GM reduced the amount of N fertilizer required to obtain wheat grain yields and biomass levels similar to wheat grown in the FW rotation by 20-33%. In the first 2 years, average grain N concentrations over all N rates increased by 6% and 12%, and those of Zn increased by 26% and 14% under the soybean GM-winter wheat (SW) rotation, compared with the FW rotation. The increased grain N and Zn concentrations were found to be related to the increased concentrations of nitrate-N and available Zn in the soil, particularly at the sowing of winter wheat. However, grain N and Zn concentrations were not improved by rotation with soybean GM in the third year. This was attributed to the dilution effect caused by the more grain yield increase than its nutrient export. In conclusion, planting soybean for GM in fallow fields reduced the need for N fertilizer to enhance wheat yields in this dryland region. Change in wheat grain N and Zn concentrations was related to soil nutrient concentrations, and to the balance between increased grain yield and its nutrient export. (C) 2014 Elsevier B.V. All rights reserved.
机译：旱地小麦是世界上小麦产量的主要贡献者，在世界上缺水和土壤肥力差是限制小麦籽粒产量和营养成分的关键因素。 2008年6月至2011年6月，在中国黄土高原（一个典型的旱地）的十里铺（北纬35.12度，东经107.45度，海拔1200m高度）进行了田间试验，研究了自转的影响。大豆（Glycine max）绿肥（GM）对后续小麦（Triticum aestivum L）的谷物产量，总氮和总锌浓度以及土壤中硝态氮和有效锌的影响。随着时间的推移，大豆转基因作物轮作对小麦单产的好处变得更加明显。在第二年和第三年，以大豆转基因小麦轮作的小麦的单产达到1081 N N（-1）的速率达到了4871和5089 Kg（-1）。在休耕型小麦（RV）轮作下，这些单产比小麦的最高单产分别高21％和12％。与大豆轮作相比，大豆转基因使获得小麦籽粒产量和生物量水平所需的氮肥用量减少了20-33％。与FW轮作相比，在前2年中，在大豆转基因-冬小麦轮作中，所有氮素水平下的平均籽粒N浓度分别增加了6％和12％，而Zn分别增加了26％和14％。 。发现增加的籽粒N和Zn浓度与土壤中硝态氮和有效锌的浓度增加有关，特别是在冬小麦播种时。但是，第三年与大豆转基因相比，轮作并没有改善谷物的氮和锌浓度。这归因于谷物增产多于其养分输出所引起的稀释效应。总之，在休耕地上种植转基因大豆减少了该旱地地区对氮肥的需求，以提高小麦产量。小麦籽粒氮，锌含量的变化与土壤养分含量有关，与谷物产量增加和养分输出之间的平衡有关。 （C）2014 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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