Determining the appropriate level of farmyard manure biochar application in saline soils for three selected farm tree species

文献类型： 外文期刊

第一作者： Bin Yousaf, Muhammad Talha

作者： Bin Yousaf, Muhammad Talha;Nawaz, Muhammad Farrakh;Ahmed, Irfan;Yasin, Ghulam;Yasin, Ghulam;Cheng, Hefa;Rahman, Shafeeq Ur;Gul, Sadaf;Rizwan, Muhammad;Rehim, Abdur;Qi Xuebin;Rahman, Shafeeq Ur

作者机构：

期刊名称：PLOS ONE （ 影响因子：3.752； 五年影响因子：4.069 ）

ISSN： 1932-6203

年卷期： 2022 年 17 卷 4 期

页码：

收录情况： SCI

摘要： Salinity is a global problem, and almost more than 20% of the total cultivated area of the world is affected by salt stress. Phytoremediation is one of the most suitable practices to combat salinity and recently biochar has showed the tremendous potential to alleviate salt-affected soils and enhance vegetation. Trees improve the soil characteristics by facilitating the leaching of salts and releasing organic acids in soil. Moreover, in the presence of trees, higher transpiration rates and lower evaporation rates are also helpful in ameliorating salt affected soils. This study was designed to check the effect of different levels of biochar on the morph-physiological characteristics of three important agroforestry tree species: Eucalyptus camaldulensis, Vachellia nilotica, and Dalbergia sissoo, in saline soils. Farmyard manure biochar was applied at the rate of 3% (w/w), 6% (w/w), and 9% (w/w) to find appropriate levels of biochar for promoting the early-stage trees growth under saline conditions. Results of the current study revealed that maximum shoot length (104.77 cm), shoot dry weight (23.72 g), leaves dry weight (28.23 g), plant diameter (12.32 mm), root length (20.89 cm), root dry weight (18.90 g), photosynthetic rate (25.33 mu moles CO2 m(-2)s(-1)) and stomatal conductance (0.12 mol H2O m(-2) s(-1)) were discovered in the plants of Eucalyptus camaldulensis at the rate of 6% (w/w). All tree species showed better results for growth and physiological characteristics when biochar was applied at the rate of 6% (w/w). In comparison, a decreasing trend in growth parameters was found in the excessive amount of biochar when the application rate was increased from 6% (w/w) to 9% (w/w) for all three species. So, applying an appropriate level of biochar is important for boosting plant growth in saline soils. Among different tree species, Vachellia nilotica and Eucalyptus camaldulensis both showed very promising results to remediate salt affected soils with Vachellia nilotica showing maximum potential to absorb sodium ions.

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