...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Agricultural Science >Dynamics of Root Growth and Distribution in Maize from the Black Soil Region of NE China
【24h】

Dynamics of Root Growth and Distribution in Maize from the Black Soil Region of NE China

机译：中国东北黑土区玉米根系生长与分布动态

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

摘要

Root growth is related to its water and mineral uptake. The structure and architecture of the root system is influenced by soil properties. Better understanding of root architecture and growth dynamics of maize grown on black soil may lead to more efficient use of applied nutrients and water by maize. Maize ( Zea mays L.), cultivar Yedan 13, was grown in a black soil field in large root boxes in 2007. Plants were regularly sampled and the following data were recorded: number of emerged roots per phytomer, mean length and maximal length of axile root per phytomer, maximum rooting depth of axile root per phytomer, and angle of axile root per phytomer by excavation methods. The distribution dynamics of root dry weight at different black soil depths, and vertical and horizontal distribution in large root boxes were measured. There were more axile roots on the upper phytomers than on lower phytomers. The number of roots on phytomers P8, P9 and P10 were 15.71%?24.82%, and 25.86% of total number of per plant, respectively . Angles of the axile roots on lower phytomers were larger than those on upper phytomers. The angle of the axile root on P2 was the largest (81.51°), followed by P4 (69.33°), P3 (56.9°), and P5 (56.06°). The angles on phytomers from P6 to P10 were smaller, ranging from 30.13-40.72°. Mean length, maximal length, and maximum rooting depth of axile root on each phytomer all increased with day after seeding (DAS). Mean length, maximal length, and maximum rooting depth of axile roots on lower phytomers were larger than those on upper phytomers. Mean length, maximal length and maximum rooting depth of axile roots on P3 were the largest (2.37 m, 2.92 m and 2.12 m at 90 DAS, respectively ). Root dry weight in each soil layer increased with DAS; there was a rapid increase from 50 to 90 DAS. About 80 % of root dry weight was in the soil above 40 cm. The general trend of percentage of dry weight in total dry weight per plant decreased as the distance from the plant increased. Over 78 % of root dry weight in total dry weight per plant was within 20 cm in the horizontal direction from the plant, and less than 6% was in the 40 cm to 60 cm zone in the horizontal direction from the plant.
机译：根的生长与其对水和矿物质的吸收有关。根系的结构和构造受土壤特性的影响。更好地了解在黑土上生长的玉米的根系结构和生长动态可能会导致玉米更有效地利用所施用的养分和水分。玉米（Zea mays L.），品种Yedan 13，于2007年在黑土场中的大根箱中生长。对植物进行定期采样并记录以下数据：每个phytomer的出根数，平均长度和最大长度每个phyphyer的腋根，每个phytomer的最大根部生根深度以及每个phytomer的腋根角度（通过挖掘方法）。测量了不同黑土深度下根系干重的分布动态，以及大根箱内的垂直和水平分布。上层实体的腋根多于下层实体。植物P8，P9和P10的根数分别为单株总数的15.71％〜24.82％和25.86％。下实体的腋根角大于上实体的角。 P2上的腋根角度最大（81.51°），其次是P4（69.33°），P3（56.9°）和P5（56.06°）。从P6到P10的phytomer的角度较小，范围为30.13-40.72°。每个植株上腋根的平均长度，最大长度和最大生根深度都随播种后一天（DAS）的增加而增加。下植体上腋根的平均长度，最大长度和最大生根深度大于上植体上的。 P3上腋生根的平均长度，最大长度和最大生根深度最大（分别在90 DAS时为2.37 m，2.92 m和2.12 m）。随着DAS的增加，各土壤层的根干重均增加。 DAS从50迅速增加到90。根干重的约80％位于40厘米以上的土壤中。随着距植物距离的增加，干重占每株植物总干重的百分比的总体趋势下降。每株植物的总干重中，超过78％的根部干重在距植物水平方向20 cm内，而在距植物水平方向40 cm至60 cm的区域中，不到6％。

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