Understanding the growth adaptive strategies of Amorpha fruticosa in response to the changes of saline soil environment under different mulch types (plastic mulch [PM]; sand mulch [SM]; rice straw mulch [RSM]; and control with non‐mulching [CK]) is very important, as this determines afforestation success in a moderately saline soil. The species' soil microenvironments, fine root traits, and biomass allocation patterns were investigated in 2016 and 2017. Compared to CK, electrical conductivity of saturated paste extracts (EC_e) reduced significantly under the mulching treatments especially under PM. Both PM and SM effectively increased soil temperature (T_soil) and available nitrogen (AN), but reduced soil organic carbon (SOC) in 2016; while RSM increased soil nutrients, but reduced T_soil. The A. fruticosa under RSM (following PM and SM) invested more biomass, to shoots relative to roots, to coarse roots relative to fine roots, and to stems and leaves at the expense of coarse roots and fine roots from 2016 to 2017, as its saline soil environment especially the low T_soil improved. In both years, the fine roots of A. fruticosa under PM employed exploitation potential or ‘extensive strategy’ (fine root mass density; fine root length density) more successfully at the 0–40 cm, while the fine roots under CK used higher exploitation efficiency or ‘intensive strategy’ (specific root length; and specific root area). The indicators of intensive strategy at the 40–60 cm were higher under PM than SM and RSM. Therefore, PM will better help A. fruticosa adapt to the harsh soil environment during afforestation in a moderately saline wasteland.

中文翻译：

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中度盐渍地覆盖覆盖对紫穗槐土壤环境及生长适应策略的影响

了解不同覆盖类型（塑料覆盖[PM]；砂覆盖[SM]；稻草覆盖[RSM]；非覆盖控制[CK]）下盐渍紫穗槐对盐土环境变化的适应策略。）非常重要，因为这决定了在中等盐分土壤中的造林成功。在2016年和2017年调查了该物种的土壤微环境，优良的根性状和生物量分配模式。与CK相比，在覆盖处理下，尤其是在PM下，饱和糊状提取物（EC _e）的电导率显着降低。PM和SM均可有效升高土壤温度（T_土）和有效氮（AN），但在2016年减少了土壤有机碳（SOC）；RSM增加了土壤养分，但减少了T_土。所述紫穗槐RSM（以下PM和SM）下投入更多的生物量，以相对于根枝条，相对于细根粗根，以及茎和叶在粗根和细根的费用2016年至2017年，作为盐碱土壤环境特别是低T_土壤得到改善。在这两年中，金露梅的优良根源在PM下，在0–40 cm处更成功地利用了开发潜力或“广泛策略”（细根质量密度；细根长度密度），而CK下的细根则采用了更高的开发效率或“密集策略”（特定根长；和特定的根区域）。在PM之下40-60 cm处强化策略的指标高于SM和RSM。因此，PM在中度盐碱化的荒地造林过程中，能更好地帮助金露梅适应恶劣的土壤环境。