Liu Wenjing, Wang Lichao, Xia Jiangbao, Lu Yue, Zong Xianguo
Shandong Key Laboratory of Eco-Environmental Science for the Yellow River Delta, Shandong University of Aeronautics, Binzhou, China.
Binzhou Hydrographic Bureau, Binzhou, China.
Front Microbiol. 2025 May 7;16:1585176. doi: 10.3389/fmicb.2025.1585176. eCollection 2025.
The effects of thinning were studied on stand growth and the physicochemical soil characteristics of typical plantations in the Yellow River flood plain in northern Shandong Province. Growth indices and soil physical and chemical indices were monitored and in 8-year-old plantations of , , and in the Yellow River Delta. Data were collected at an initial stand density of 3 m × 3 m and 3 years after artificial thinning to a stand density of 3 m × 6 m. (1) Thinning promoted growth, and the effect on the plantation was the greatest. The diameter at breast height, tree height and crown width increased by 41.28, 19.98, and 59.49%, respectively. (2) Thinning increased the soil moisture at the studied plantations, reduced the soil bulk density, and increased the soil porosity and the water holding capacity. The results differed among the plantations, with the greatest improvement occurring at the plantation. (3) Thinning had a greater effect on inorganic than on organic soil nutrients according to forest type; the changes in nitrogen, phosphorus and potassium contents in different soil layers substantially varied with the species planted. Most variables significantly differed at the plantation, and the changes in different soil layers were inconsistent. (4) Thinning significantly increased the correlations between stand growth and soil physicochemical properties. Thinning positively affected forest growth and soil physicochemical properties, but the variation in each index across the different plantations was quite different. Thus, thinning could help promote the stable and sustainable development of forest plantations in the Yellow River Delta, and these results provide a reference for the rational management of plantations.
研究了间伐对山东省北部黄河泛滥平原典型人工林林分生长及土壤理化性质的影响。对黄河三角洲地区8年生的[树种1]、[树种2]和[树种3]人工林的生长指标和土壤理化指标进行了监测。数据采集于初始林分密度为3米×3米时，以及人工间伐至林分密度为3米×6米3年后。（1）间伐促进了林木生长，对[树种1]人工林的影响最大。胸径、树高和冠幅分别增加了41.28%、19.98%和59.49%。（2）间伐增加了研究区人工林的土壤水分，降低了土壤容重，增加了土壤孔隙度和持水能力。不同人工林的结果存在差异，[树种1]人工林的改善最为明显。（3）根据林分类型，间伐对土壤无机养分的影响大于有机养分；不同土层中氮、磷、钾含量的变化因种植树种而异。大多数变量在[树种1]人工林中有显著差异，不同土层的变化不一致。（4）间伐显著增加了林分生长与土壤理化性质之间的相关性。间伐对森林生长和土壤理化性质有积极影响，但不同人工林各指标的变化差异较大。因此，间伐有助于促进黄河三角洲人工林的稳定和可持续发展，这些结果为人工林的合理经营提供了参考。
