Interspecific interaction alters root morphology in young walnut/wheat agroforestry systems in northwest China
Interspecific interaction alters root morphology in young walnut/wheat agroforestry systems in northwest China
复制标题
种间相互作用改变中国西北核桃/小麦幼苗农林复合系统的根系形态
DOI：
10.1007/s10457-017-0133-2
复制
发表时间：
2019-04-01
影响因子：
2.2
通讯作者：
Li, L. H.
中科院分区：
文献类型：
--
作者：
Duan, Z. P.;Gan, Y. W.;Li, L. H.
本试验的目的是了解核桃（Juglans regia L.）小麦（Triticum aestivum L.）间作系统研究了间作对小麦地上部分产量和土地当量比的影响。实验在新疆维吾尔自治区南部的和田进行。结果表明，核桃/小麦间作降低了两个组分物种的地上产量。间作系统的LER平均为1.62。这意味着间作提高了土地利用效率。与单作相比，间作显著降低了两个组成物种的根长密度、根表面积密度和根直径。间作显著增加了核桃的比根长。种间根系竞争在0- 40 cm土层最大。根系竞争导致RD和比根长分布不均。根系形态和空间分布的可塑性是核桃/小麦复合农林业系统适应竞争并最大限度地吸收水分和养分的关键。
The objective of this experiment was to learn more about root morphology and spatial distribution in a specify walnut (Juglans regia L.)/wheat (Triticum aestivum L.) intercropping system. The effects of intercropping on aboveground yield and land equivalent ratio (LER) were also determined. The experiment was conducted at Hetian in the southern part of the Xinjiang Uyghur Autonomous Region. The results showed that walnut/wheat intercropping reduced the aboveground yield of both component species. However, the LER of the intercropping system averaged 1.62. This meant that intercropping increased land use efficiency. Intercropping significantly reduced the root length density, root surface area density, and root diameter (RD) of both component species compared with sole-cropping. In contrast, intercropping significantly increased the specific root length of walnut. Root competition between species was the greatest in the 0-40cm soil depth. Root competition caused uneven distribution of RD and specific root length. The plasticity of root morphology and spatial distribution is key for adapting to competition and maximizing water and nutrient uptake in walnut/wheat agroforestry systems.