Magnesium supply regulate leaf nutrition and plant growth of soilless cultured cherry tomato - interaction with potassium

Guan, Xiangying; Wang, Xiaozhong; Bin, Liu; Wu, Changchun; Liu, Chuanyun; Liu, Dunyi; Zou, Chunqin; Chen, Xinping

doi:10.21203/rs.3.rs-15977/v1

Cited by 4 publications

(1 citation statement)

References 39 publications

(63 reference statements)

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“…The mean figures for the copper content in leaves were as follows: 602.04 mg/kg with the treatment of 5 kg/m 2 biosolids; 339.9 mg/kg with the treatment of 7 kg/m 2 of biosolids; and, finally, 306.6 mg/kg with the control treatment. These results can be explained by the high heavy metal content in the biosolids as compared to other organic matters, and based on the nature of its origin, which has been acknowledged in many studies [69]. Hence, it was essential to compare the levels of pollutants and nutrients with the internationally acceptable levels of the same minerals in tomatoes to assess the biosolid's actual effects and develop a conclusion.…”

Section: Chemical Analysismentioning

confidence: 99%

Investigating the Quality and Efficiency of Biosolid Produced in Qatar as a Fertilizer in Tomato Production

et al. 2021

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This study evaluated biosolid quality over time and the efficiency of using amounts (5 and 7 kg/m2) of municipal class A biosolids in Qatar to fertilize tomato plants (Solanum lycopersicum). Random samples were subjected to physical and chemical analysis, which revealed excellent particle uniformity and stability with minor odor defects. The analysis confirmed the product was nutrient-rich while pollutant levels were below the international standards. The nominated rates were used to fertilize tomato plants in pots grown in a greenhouse for four months with a control treatment of manure and Peat-Moss, before measuring the plant biological characteristics. Plants were examined via chemical analysis of nutrients and pollutants both for the whole plant and for stems, fruits, and leaves. Results indicated that both experimental treatments enhanced plant growth and development as compared to the control treatment. However, the chemical analyses also revealed levels of zinc, copper, and manganese in the plant fruits that were well in excess of the maximum acceptable levels, as defined by international health organizations. This study found that while the application of class A biosolids as organic fertilizer for tomato plants greatly enhanced the overall plant growth, the plant fruits contained toxic levels of trace heavy metals.

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Section: Chemical Analysismentioning

confidence: 99%

Investigating the Quality and Efficiency of Biosolid Produced in Qatar as a Fertilizer in Tomato Production

et al. 2021

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Unraveling the Tolerance of Moringa oleifera to Excess K through Increased N Absorption and Mg Use Efficiency

da Silva,

Cazetta,

de Mello Prado

2024

Agronomy

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The tolerance of Moringa oleifera plants to excess K may be linked to nutritional mechanisms, but studies are lacking. The present study was conducted to analyze the tolerance of Moringa oleifera to nutritional imbalance and its importance in the growth of plants submitted to high doses of K in the absence and presence of N. The experiment was conducted in pots with 9 dm3 of Oxisol in a 4 × 2 factorial scheme, with potassium doses of 0, 110, 190, and 265 mg dm−3 combined with nitrogen doses of 0 and 100 mg dm−3. The increase in K uptake by moringa is enhanced by N supply but decreases the uptake of Ca and Mg. Notwithstanding, this was of little importance as the soil cultivated had adequate Ca and Mg contents and was sufficient for adequate plant nutrition without impairing plant growth. The moringa plant is tolerant to nutritional imbalances when grown in environments with high K content probably because N favors an increase in Mg use efficiency, avoiding biological disturbances. The results of this study contributed to our understanding of how moringa induces nutritional mechanisms of action to deal with excess K in crops.

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Critical Leaf Magnesium Thresholds for Growth, Chlorophyll, Leaf Area, and Photosynthesis in Rice (Oryza sativa L.) and Cucumber (Cucumis sativus L.)

Xie,

Pan,

Meng

et al. 2024

Agronomy

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Accurately understanding the critical threshold of leaf magnesium (Mg) concentration is crucial for rapid diagnosis of crop Mg status; however, little information is available on critical Mg concentration for different physiological processes in dicots and monocots. Here, we investigated the sensitivity of biomass, chlorophyll (Chl) at different leaf positions/ages, leaf area (LA), and photosynthesis (Pn) to Mg deficiency between rice (Oryza sativa L.) and cucumber (Cucumis sativus L.). Plants were grown hydroponically under twelve Mg concentration gradients. Results showed reducing the external Mg supply to a certain level resulted in significant decline in biomass, Chl, LA, and Pn in both plants. A leaf Mg threshold of 0.97 mg g−1 DM (dry matter) for total biomass was found in rice, which was not identified in cucumber. Critical Mg thresholds for Chl a, b, and carotenoids (Car) showed a decreasing trend with leaf age, suggesting Chl in upper young leaves are more sensitive to Mg deficiency; however, visible Mg-deficiency symptoms were predominantly in mid-aged leaves with a higher rate of Mg remobilization, especially in cucumber. Leaf critical Mg concentrations for Chl a+b, Pn, and LA were 1.22, 1.05, and 1.00 mg g−1 DM in rice, respectively, which were lower than those of cucumber, 4.23, 4.09, and 3.55 mg g−1 DM, implying that cucumber was more susceptible to low Mg stress; Chl a+b was the most sensitive indicator of Mg deficiency. Overall, Chl a+b of upper young mature leaves can be used as an early diagnostic index of Mg nutrition in crops, especially Mg-insensitive crops.

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Magnesium supply regulate leaf nutrition and plant growth of soilless cultured cherry tomato - interaction with potassium

Cited by 4 publications

References 39 publications

Investigating the Quality and Efficiency of Biosolid Produced in Qatar as a Fertilizer in Tomato Production

Investigating the Quality and Efficiency of Biosolid Produced in Qatar as a Fertilizer in Tomato Production

Unraveling the Tolerance of Moringa oleifera to Excess K through Increased N Absorption and Mg Use Efficiency

Critical Leaf Magnesium Thresholds for Growth, Chlorophyll, Leaf Area, and Photosynthesis in Rice (Oryza sativa L.) and Cucumber (Cucumis sativus L.)

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