Shelter efficiency of windbreak influenced by stand configuration

IF 4.4 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Biosystems Engineering Pub Date : 2025-05-29 DOI:10.1016/j.biosystemseng.2025.104192

Ruijie Zhang , Rui Ma , Yanjun Ma , Fu Zhang , Linyuan Wei , Gazangzhuoma Xie

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Abstract

Stand density and planting point configuration are two critical parameters influencing windbreak efficiency. This study investigates how stand density and triangular planting point configurations affect wind speed in Haloxylon ammodendron windbreaks. Wind tunnel experiments were conducted on four windbreaks with varying dimensions: A (17 cm × 17 cm), B₁ (17 cm × 34 cm), B₂ (34 cm × 17 cm), and C (34 cm × 34 cm), corresponding to field densities of 1500, 750, 750, and 375 plants·ha⁻¹, which also represented the planting density, reserved density and natural vegetation density of H. ammodendron, respectively. Results showed faster wind speed variation near windbreaks with higher densities, with windbreak B₁ (row spacing > plant spacing) exhibiting faster variation than B₂ (plant spacing > row spacing). The area of weak wind speed (U/U₀ < 0.5) around B₁ was approximately three times that of B₂. Wind reductions downstream the windbreaks were not proportional to stand density, with ratios of A:B:C ≈ 6:3:2. The position of U_min moved further leeward as stand density decreased, accompanied by an increase in U_min values. These results highlight the significant influence of both stand density and planting point configuration on windbreak efficiency, offering valuable insights for optimising windbreak design in arid regions.

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林分形态对防风林遮蔽效率的影响

林分密度和种植点配置是影响防风林效率的两个关键参数。研究梭梭防风林林分密度和三角形植点配置对风速的影响。在A （17 cm × 17 cm）、B1 （17 cm × 34 cm）、B2 （34 cm × 17 cm）、C (34 cm × 34 cm) 4个不同尺寸的防风林上进行风洞试验，分别对应梭梭的田间密度1500株、750株、750株、375株·ha−1，也分别代表梭梭的种植密度、保留密度和自然植被密度。结果表明：风挡林附近风速变化较快，风挡林密度较高，排距B1；株距)比B2(株距>；行间距)。弱风速区(U/U0 <；0.5)，大约是B2的3倍。防风林下游的风减量与林分密度不成正比，其比值为A:B:C≈6:3:2。随着林分密度的降低，Umin的位置进一步向下风移动，Umin值也随之增加。这些结果突出了林分密度和种植点配置对防风林效率的显著影响，为优化干旱地区的防风林设计提供了有价值的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Biosystems Engineering 农林科学-农业工程

CiteScore

10.60

自引率

7.80%

发文量

239

审稿时长

53 days

期刊介绍： Biosystems Engineering publishes research in engineering and the physical sciences that represent advances in understanding or modelling of the performance of biological systems for sustainable developments in land use and the environment, agriculture and amenity, bioproduction processes and the food chain. The subject matter of the journal reflects the wide range and interdisciplinary nature of research in engineering for biological systems.