Department of Environmental Science, V.B.S. Purvanchal University, Jaunpur, 222003, India.
Department of Environmental Science, V.B.S. Purvanchal University, Jaunpur, 222003, India.
Environ Res. 2022 Aug;211:113081. doi: 10.1016/j.envres.2022.113081. Epub 2022 Mar 15.
Soil salinity is progressively affecting global agriculture area, and act as a brutal environmental factor for the productivity of plants, therefore, sustainable remediation of the saline soil is urgently required. In this study, we tested the effectiveness of PM (poultry manure), SMS (spent mushroom substrate), and CD (cow dung) for the recovery of salt soil and the optimization of the productivity of the maize plant. PM and SMS showed the valuable source of OC, N, P, K as the CD. The HCA analysis showed that 47% of the bacterial population from PM, SMS, and CD survived at 6% NaCl (w/v), which had PGP attributes such as IAA, P-solubilizers, and siderophore activity. The results from pot experiments of plant growth and PCA analysis of bacterial PGP attributes reveled re formulation of PM, SMS, and CD, which were further optimized at the saline field level. T-2 treated plant increased their shoot length, chlorophyll content, reducing sugar, nitrogen, phosphorus, and potassium levels significantly after 30 and 60 days, followed by T-4 and T-3 as the control. A significant (P < 0.01) increase in particle density and decrease in bulk density was observed for all combinations treated (T-2 to T-7). A two-year field study revealed that the T-2 combination increased 43% OC, 57% N, 66% P, 48% K, 32% DHA, 76% PPO in the soil than the control after 60 days. T2-combination decreased ≈50% of Na content in root and shoot, and increased 27% of maize crop yield. The dose of 10% PM + 10% SMS can significantly induce the growth of maize plants and the restoration of saline soil health.
土壤盐渍化正逐渐影响全球农业用地，并成为植物生产力的残酷环境因素，因此，迫切需要可持续地修复盐碱土。本研究测试了 PM（家禽粪便）、SMS（废弃蘑菇基质）和 CD（牛粪）对盐土恢复和玉米植物生产力优化的有效性。PM 和 SMS 显示出 OC、N、P、K 等 CD 的有价值的来源。HCA 分析表明，47%的 PM、SMS 和 CD 细菌在 6%NaCl（w/v）下存活，具有 IAA、P 溶解剂和铁载体活性等 PGP 属性。植物生长的盆栽试验结果和细菌 PGP 属性的 PCA 分析表明，PM、SMS 和 CD 进行了重新配方，并在盐碱地水平上进一步优化。T-2 处理的植物在 30 和 60 天后明显增加了其茎长、叶绿素含量、还原糖、氮、磷和钾水平，其次是 T-4 和 T-3 作为对照。所有处理（T-2 至 T-7）的颗粒密度显著增加，而体密度显著降低。为期两年的田间研究表明，与对照相比，T-2 组合在 60 天后增加了 43%的 OC、57%的 N、66%的 P、48%的 K、32%的 DHA 和 76%的 PPO。T2 组合使根和茎中的 Na 含量降低了 ≈50%，并使玉米作物产量增加了 27%。10%PM+10%SMS 的剂量可以显著诱导玉米植物的生长和盐碱土的恢复。
