Effectiveness of gypsum application and arbuscular mycorrhizal fungi inoculation on ameliorating saline-sodic soil characteristics and their productivity.

T. Khalifa
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引用次数: 3

Abstract

HE DEGRADATION of soil characteristics caused by salinity and sodicity gives rise to severe limitations on crop production. Therefore, the current study was conducted in a split block design with three replicates during the winter (2019/2020) and summer (2020) seasons at Sakha Agriculture Research Station Farm, Kafr El-Sheikh Gov., Egypt to study the integrated effect of gypsum with mycorrhizae fungi inoculation to improve saline-sodic soil properties and bacterial communities, physiological and productivity of wheat and maize plants. The treatments included different soil gypsum levels (G 0 : none, G 1 : 7.5 Mg ha -1 , and G 2 : 10 Mg ha -1 ) of the requirements and mycorrhizal fungi inoculation (without inoculation AMF 0 and inoculated AMF 1 ). The results showed that the combination of G 2 + AMF 1 caused significant changes in the photosynthetic activity, antioxidant enzyme activities (catalase, peroxidase and superoxide dismutase), mycorrhizal root colonization, total bacterial counts, P solubilizer bacteria, and respiration of microbial soil in the Rhizosphere of wheat and maize. In addition, after two growing seasons, electrical conductivity (EC) decreased from 7.09 to 4.57 dS m -1 , exchangeable sodium percentage (ESP) from 19.35 to 15.47 and soil bulk density (BD) from 1.38 to 1.31 Mg m -3 . While the exchangeable calcium percentage (ECaP) increased from 11.51 to 15.47, available phosphorus (Av. P) from 8.19 to 11.17 mg kg -1 , infiltration rate (IR) from 0.7 to 0.97 cm hr -1 , and total porosity (TP) from 47.92 to 50.44 % and G 2 + AMF 1 treatment gave the highest grain yield of wheat and maize were 7.72 and 8.52 Mg ha -1 , respectively. Current findings concluded that the incorporation of gypsum application with AMF inoculation could be applied as an effective way of ameliorating saline-sodic soil characteristics and alleviating the hazardous effects of soil salinity and sodicity on wheat and maize plants.
施用石膏和接种丛枝菌根真菌对改善盐碱地特性及其生产力的效果。
盐碱度和碱度引起的土壤特性退化严重限制了作物生产。因此,本研究在埃及Kafr El-Sheikh Gov的Sakha农业研究站农场进行了冬季(2019/2020)和夏季(2020)三个重复的分割块设计,研究石膏与菌根真菌接种对改善小麦和玉米盐碱地性质和细菌群落、生理和生产力的综合效应。不同土壤石膏需用量(g0:无、g1: 7.5 Mg ha -1和g2: 10 Mg ha -1)处理和菌根真菌接种(未接种AMF 0和接种AMF 1)处理。结果表明,g2 + amf1对小麦和玉米根际微生物土壤的光合活性、抗氧化酶(过氧化氢酶、过氧化物酶和超氧化物歧化酶)活性、菌根定植、细菌总数、P增溶菌数和呼吸作用均有显著影响。2个生长季后,土壤电导率(EC)由7.09降至4.57 dS m -1,交换钠率(ESP)由19.35降至15.47,土壤容重(BD)由1.38降至1.31 Mg m -3。交换钙率(ECaP)从11.51提高到15.47,有效磷(Av. P)从8.19提高到11.17 mg kg -1,入渗速率(IR)从0.7提高到0.97 cm hr -1,总孔隙率(TP)从47.92提高到50.44%,g2 + amf1处理的小麦和玉米产量最高,分别为7.72和8.52 mg ha -1。综上所述,施用石膏与接种AMF可作为改善土壤盐碱化特性和减轻土壤盐碱化对小麦和玉米植株危害的有效途径。
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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