Soil heterogeneity and earthworms independently promote growth of two bamboo species
Soil heterogeneity and earthworms independently promote growth of two bamboo species
复制标题
土壤异质性和蚯蚓独立促进两种竹种的生长
DOI：
10.1016/j.ecolind.2021.108068
复制
发表时间：
2021-08-09
影响因子：
6.9
通讯作者：
Yu, Fei-Hai
中科院分区：
文献类型：
--
作者：
Si, Chao;Xue, Wei;Yu, Fei-Hai
土壤在空间上是不均匀的，蚯蚓在陆地生态系统中分布广泛。虽然土壤异质性和蚯蚓都能影响植物的生长，但它们是否能相互作用影响竹种的生长还没有研究。在温室试验中，我们种植了两个矮生竹种，Sasa argenteosriata和Sasaella glabra，分别在由两种不同类型的土壤斑块组成的非均质土壤和两种类型的土壤斑块均匀混合的均质土壤中。这些土壤中加入或不加入蚯蚓。两个S。argenteosriata和S.在非均质土壤中，光果草的生长量大于均质土壤，在有蚯蚓的土壤中，光果草的生长量大于无蚯蚓的土壤。土壤异质性和蚯蚓没有相互作用，影响任何一个竹种的性能。独立的蚯蚓的存在下，这两个竹种同样生长良好，在两种类型的土壤斑块内的异质性土壤，表明竹子的觅食行为是弱的，这可能是因为资源之间的相互关联的分株位于不同的土壤斑块均匀植物响应不同的资源水平。这些结果表明，养分的异质性供应可能有助于竹种的生长，这些行动应纳入竹林的可持续经营。
Soils are commonly spatially heterogeneous and earthworms are widely distributed in terrestrial ecosystems. While both soil heterogeneity and earthworms can influence the performance of plants, whether they can interact to affect the growth of bamboo species has not been examined. In a greenhouse experiment, we planted two dwarf bamboo species, Sasa argenteosriata and Sasaella glabra, separately in a heterogeneous soil consisting of two different types of soil patches and in a homogeneous soil in which the two types of soil patches were evenly mixed. These soils were added with or without earthworms. Both S. argenteosriata and S. glabra grew more in the heterogeneous soil than in the homogeneous soil and in the soil with earthworms than in the soil without earthworms. Soil heterogeneity and earthworms did not interact to influence the performance of either bamboo species. Independent of the presence of earthworms, both bamboo species grew equally well in the two types of soil patches within the heterogeneous soil, indicating that the foraging behavior of bamboos is weak; this is likely because resource translocation between interconnected ramets located in different soil patches homogenized plant responses to different resource levels. These results indicate that a heterogeneous supply of nutrients may aid in the growth of bamboo species, and these actions should be integrated into the sustainable management of bamboo forests.