A spectral parameter for the estimation of soil total nitrogen and nitrate nitrogen of winter wheat growth period

Zhang, Juanjuan; Wei, Qinqin; Xiong, Shuping; Shi, Lei; Ma, Xinming; Du, Pan; Guo, Jianbiao

doi:10.1111/sum.12639

Cited by 12 publications

(9 citation statements)

References 32 publications

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“…The positive correlation between the total N and NO3 − -N content of OAs with the plant growth parameters signified that they have a mutual relationship. Zhang et al [73] found similar results showing a stronger correlation between soil NO3 − -N and plant N concentration than the total N and plant N concentrations. Furthermore, mobile nutrients in soil solutions, such as NO3 − -N, do not develop strong depletion zones around roots; their concentration decreases extremely rapidly due to root uptake [74].…”

Section: Correlation Between Nutrient Content N Mineralization Of Com...mentioning

confidence: 70%

Influence of Various Composted Organic Amendments and Their Rates of Application on Nitrogen Mineralization and Soil Productivity Using Chinese Cabbage (Brassica rapa. L. var. Chinensis) as an Indicator Crop

2022

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There is a diversity of locally available nitrogen (N)-rich organic materials in Samoa. However, none of them was evaluated for their N supplying capacity after composting in Samoan Inceptisols for vegetable cultivation. Thus, N-releasing capacity of five composted organic amendments (OAs) namely macuna, gliricidia, erythrina, lawn grass and giant taro, and their two application rates (10 and 20 t ha−1) were assessed through a laboratory incubation and a crop response study using Chinese cabbage as a test crop. Among the OAs, composted mucuna was characterized by a higher total N (2.91%), organic C (63.6%) and NO3−N content (341 mg N kg−1). A significant difference in N mineralization was observed among the OAs as well as application rates. The highest N mineralization was recorded in composted mucuna followed by gliricidia, erythrina, lawn grass, and giant taro. A crop response study also showed a similar trend. Mucuna treatment had the highest biomass yield and N uptake followed by gliricidia, erythrina, lawn grass, and giant taro. Leguminous composted OAs @ 20 t ha−1 performed substantially better in all the plant growth and yield parameters, and N uptake compared to 10 t ha−1 that was not the case for non-leguminous OAs. Thus, non-leguminous OAs should be applied at 10 t ha−1. All the composted leguminous OAs showed promising results while mucuna was the best in both the application rates. Therefore, mucuna can be promoted to supply N for crop cultivation in Samoa, other Pacific Islands and tropical countries where N fertilizer is costly and not easily available.

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Section: Correlation Between Nutrient Content N Mineralization Of Com...mentioning

confidence: 70%

Influence of Various Composted Organic Amendments and Their Rates of Application on Nitrogen Mineralization and Soil Productivity Using Chinese Cabbage (Brassica rapa. L. var. Chinensis) as an Indicator Crop

2022

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“…Here, the importance of NDVI to differentiate management zones for nitrogen fertilization is indisputable, as N tot strongly influences this indicator. This correlation has been thoroughly studied in the past decades due to the importance of nitrogen to plant biomass production (e.g., recently: [55][56][57]).…”

Section: Soil Total Nitrogen (N Tot ) and Extractable Phosphorus (P)mentioning

confidence: 99%

Assessing the Contribution of ECa and NDVI in the Delineation of Management Zones in a Vineyard

et al. 2022

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Precision fertilization implies the need to identify the variability of soil fertility, which is costly and time-consuming. Remotely measured data can be a solution. Using this strategy, a study was conducted, in a vineyard, to delineate different management zones using two indicators: apparent soil electrical conductivity (ECa) and normalized difference vegetation index (NDVI). To understand the contribution of each indicator, three scenarios were used for zone definition: (1) using only NDVI, (2) only ECa, or (3) using a combination of the two. Then the differences in soil fertility between these zones were assessed using simple statistical methods. The results indicate that the most beneficial strategy is the combined use of the two indicators, as it allowed the definition of three distinct zones regarding important soil variables and crop nutrients, such as soil total nitrogen, Mg2+ cation, exchange acidity, and effective cation exchange capacity, and some relevant cation ratios. This strategy also allowed the identification of an ionic unbalance in the soil chemistry, due to an excess of Mg2+, that was harming crop health, as reported by NDVI. This also impacted ECa and NDVI relationship, which was negative in this study. Overall, the results demonstrate the advantages of using remotely sensed data, mainly more than one type of sensing data, and suggest a high potential for differential crop fertilization and soil management in the study area.

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“…A similar study reported that TN accumulation in rice was significantly correlated with NH 4 + -N in the soil (Chen et al, 2012). Huo et al (2020) showed that total plant N increased in rice under Cu stress when N was (Zhang et al, 2021).…”

Section: N Supply Improves Plant N Accumulation Increasing Fluoranthe...mentioning

confidence: 99%

The nutrient preferences of rice and wheat influence fluoranthene uptake

Xiao

Zhang

et al. 2022

Front. Environ. Sci.

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Applications of the key plant nutrient nitrogen (N) increase the uptake and accumulation of pollutants such as polycyclic aromatic hydrocarbons (PAHs). However, it is unclear how a plant’s preference for a particular form of N in the soil affects the uptake and accumulation of PAHs. In this study, we investigated the physiological mechanisms involved in fluoranthene uptake by rice (Oryza sativa L.) and wheat (Triticum aestivum L.) and examined how these mechanisms were affected by different forms of N treatment under an equivalent N supply. Both N form and plant species affected plant fluoranthene uptake. Rice accumulated more fluoranthene than wheat under an equivalent N supply, while the transfer coefficient of fluoranthene in wheat was higher than that in rice. Fluoranthene accumulation in rice and wheat was positively correlated with plant root morphology parameters, and the transfer coefficient was positively correlated with transpiration. Of the treatments examined, ammonium (NH4+-N)-treated rice and nitrate (NO3−-N)-treated wheat accumulated the most fluoranthene at equivalent N supply. Fluoranthene accumulation was positively correlated with plant growth, total nitrogen N content, total protein content, and antioxidant enzyme activities. Based on a partial least squares path model (PLS-PM) analysis, total plant N was the main factor influencing fluoranthene uptake by rice and wheat treated with different forms of N. Overall, ammonium-preferring rice and nitrate-preferring wheat had the highest nutrient content in their preferred N forms, which also promoted fluoranthene uptake. Therefore, regulating the form of N applied to the soil could be a suitable strategy to improve the safety of agricultural products.

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A spectral parameter for the estimation of soil total nitrogen and nitrate nitrogen of winter wheat growth period

Cited by 12 publications

References 32 publications

Influence of Various Composted Organic Amendments and Their Rates of Application on Nitrogen Mineralization and Soil Productivity Using Chinese Cabbage (Brassica rapa. L. var. Chinensis) as an Indicator Crop

Influence of Various Composted Organic Amendments and Their Rates of Application on Nitrogen Mineralization and Soil Productivity Using Chinese Cabbage (Brassica rapa. L. var. Chinensis) as an Indicator Crop

Assessing the Contribution of ECa and NDVI in the Delineation of Management Zones in a Vineyard

The nutrient preferences of rice and wheat influence fluoranthene uptake

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