Use of Potassium Fertilization to Ameliorate the Adverse Effects of Saline-sodic Stress Condition (ECw: SARw Levels) in Rice (Oryza Sativa L.)

Munir, Ahmad; Shehzad, Muhammad Tahir; Qadir, Ayesha Abdul; Murtaza, Ghulam; Khalid, Hafiza Iqra

doi:10.1080/00103624.2019.1648657

Cited by 14 publications

(8 citation statements)

References 29 publications

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“…Soluble carbohydrates, as a "bridge metabolite" between source and sink, could buffer the damage to plants caused by stress through osmotic adjustment. In this study, salt-alkaline stress increased the accumulation of soluble sugars in the leaves (Table 1), which was consistent with the results of Munir et al [18]. These soluble sugars could participate in the osmotic adjustment of plants, which facilitates water absorption under stress conditions.…”

Section: Effect Of Salt-alkaline Stress On the Activities Of β-Amylas...supporting

confidence: 93%

“…Therefore, the impact of salt-alkaline adversity on plant carbon metabolism is mainly manifested in the process of carbohydrate metabolism. The soluble sugar content in plant tissues increased under salt-alkaline stress and gradually increased with the increasing of salt concentration [17,18]. However, some studies have noted that the influence of salt-alkaline stress on soluble sugar content, and the change in the trend of soluble sugar content with stress intensity and stress time, varies with species and plant parts [19,20].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Salt-Alkaline Stress on Carbohydrate Metabolism in Rice Seedlings

Shao¹,

Gai²,

Gao³

et al. 2022

Phyton

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The aim of this study was to investigate carbohydrate metabolism in rice seedlings subjected to salt-alkaline stress. Two relatively salt-alkaline tolerant (Changbai 9) and sensitive (Jinongda 138) rice cultivars, grown hydroponically, were subjected to salt-alkaline stress via 50 mM of salt-alkaline solution. The carbohydrate content and the activities of metabolism-related enzymes in the leaves and roots were investigated. The results showed that the contents of sucrose, fructose, and glucose in the leaves and roots increased under salt-alkaline stress. Starch content increased in the leaves but decreased in the roots under salt-alkaline stress. The activities of sucrose-phosphate synthase, sucrose synthase, amylase, and ADP-glucose pyrophosphorylase increased whereas the activities of neutral invertase and acid invertase decreased in the leaves under salt-alkaline stress. The activities of sucrose-phosphate synthase, sucrose synthase, amylase, neutral invertase, and acid invertase increased in the roots under salt-alkaline stress. In conclusion, salt-alkaline stress caused the accumulation of photosynthetic assimilates in the leaves and decreased assimilation export to the roots.

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Section: Effect Of Salt-alkaline Stress On the Activities Of β-Amylas...supporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Effects of Salt-Alkaline Stress on Carbohydrate Metabolism in Rice Seedlings

Shao¹,

Gai²,

Gao³

et al. 2022

Phyton

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“…In addition, K fertilizer may increase the Vc content, which enhances the antioxidant capacity of garlic. Meanwhile, K promotes the synthesis of N into amino acids to further increase soluble protein, while reducing the accumulation of nitrates (Munir et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Responses of Garlic Quality and Yields to Various Types and Rates of Potassium Fertilizer Applications

Wang

Chu

et al. 2022

horts

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Potassium (K) is a critical plant nutrient that determines quality in a myriad of crops and increases production yields. However, excessive application of various types of K fertilizers can decrease both the food quality and yields, which translates as economic losses and food safety issues. The objectives of this study were to 1) elucidate the impacts of different application rates of various K fertilizers on garlic, with the aim to identify the optimal and most economical K fertilizer dosage and 2) compare the effects of applying two common K fertilizers (KCl and K2SO4) on garlic, to determine the optimal combination. From 2018 to 2020, we utilized two distinct K-fertilized fields to conduct our experiments. The results revealed optimal KCl fertilization increased the biomass and vegetation index in garlic, and promoted the transfer of nitrogen, phosphorus, and potassium nutrients from the stem and leaf to bulb, thereby increasing bulb production. The application of KCl fertilizer increased the number of cloves, the diameters of the cloves and bulbs, and reduced variations in bulb size. In addition, the application of KCl fertilizer improved the nutritional quality (Vitamin C, soluble sugar, soluble protein, and allicin) of the garlic and reduced the accumulation of nitrate. However, excessive KCl fertilizer cause decreased yields, appearance traits, and nutritional quality. Applying the same rate of K fertilizer in the form of K2SO4 in isolation increased the garlic yield by only 0.1% to 22.5% when compared with KCl fertilizer. However, the results were not always significant. In this study, the highest yields, appearance traits, and nutritional quality were achieved with the ratio of K2SO4: KCl = 3:1. Consequently, to ensure the highest economic value (considering the market prices of K fertilizer, garlic sprouts, and bulbs), the authors recommend a K fertilizer rate of 252.5 kg·ha−1 K2O, with K2SO4 accounting for 61.6% for garlic production in field.

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“…To date, many efforts have been devoted to investigating the responses of nitrogen morphological conversion, most often through microbe-mediated processes, to biochar addition in saline environments. Therefore, the effect and mechanism of biochar addition on nitrification have received increasing attention, as nitrification is closely related to mineralization, fixation, and denitrification [9]. However, recent reviews of the effect of biochar on nitrification in salt-affected soil are inconsistent and even contradictory.…”

Section: Introductionmentioning

confidence: 99%

Biochar Addition Inhibits Nitrification by Shifting Community Structure of Ammonia-Oxidizing Microorganisms in Salt-Affected Irrigation-Silting Soil

Yao

Yang

et al. 2022

Microorganisms

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Biochar has been widely recognized as an effective and eco-friendly ameliorant for saline soils, but information about the mechanism of how biochar influences nitrification in salt-affected agroecosystem remains fragmented. An incubation experiment was performed on the salt-affected soil collected from a three-consecutive-year experiment at biochar application gradients of 7.5 t⋅ha−1, 15 t⋅ha−1 and 30⋅t ha−1 and under nitrogen (N) fertilization. Responses of the nitrification rate (NR), numbers of ammonia monooxygenase (amoA) gene copies, and community structures of ammonia-oxidizing bacteria (AOB) and archaea (AOA) to biochar application were investigated. The results indicated that, under N fertilization, the NR and numbers of amoA-AOB and amoA-AOA gene copies negatively responded to biochar addition. Biochar application increased the community diversity of AOB but decreased that of AOA. Biochar addition and N fertilization shifted the AOB community from Nitrosospira-dominated to Nitrosospira and Nitrosomonas-dominated, and altered the AOA community from Nitrososphaera-dominated to Nitrososphaera and Nitrosopumilus-dominated. The relative abundance of Nitrosospira, Nitrosomonas and Nitrosopumilus decreased, and that of Nitrosovibrio and Nitrososphaera increased with biochar application rate. Soil SOC, pH and NO3−-N explained 87.1% of the variation in the AOB community, and 78.1% of the variation in the AOA community was explanatory by soil pH and SOC. The SOC and NO3−-N influenced NR through Nitrosovibrio, Nitrosomonas, Norank_c_environmental_samples_p_Crenarchaeota and amoA-AOB and amoA-AOA gene abundance. Therefore, biochar addition inhibited nitrification in salt-affected irrigation-silting soil by shifting the community structures of AOB and AOA and reducing the relative abundance of dominant functional ammonia-oxidizers, such as Nitrosospira, Nitrosomonas and Nitrosopumilus.

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Use of Potassium Fertilization to Ameliorate the Adverse Effects of Saline-sodic Stress Condition (EC_w: SAR_w Levels) in Rice (Oryza Sativa L.)

Cited by 14 publications

References 29 publications

Effects of Salt-Alkaline Stress on Carbohydrate Metabolism in Rice Seedlings

Effects of Salt-Alkaline Stress on Carbohydrate Metabolism in Rice Seedlings

Responses of Garlic Quality and Yields to Various Types and Rates of Potassium Fertilizer Applications

Biochar Addition Inhibits Nitrification by Shifting Community Structure of Ammonia-Oxidizing Microorganisms in Salt-Affected Irrigation-Silting Soil

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