Excessive nutrient balance surpluses in newly built solar greenhouses over five years leads to high nutrient accumulations in soil

Bai, Xinlu; Gao, Jun; Wang, Shi-chao; HongMing, Cai; Chen, Zhujun; Zhou, Jianbin

doi:10.1016/j.agee.2019.106717

Cited by 73 publications

(26 citation statements)

References 49 publications

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“…It is consistent with other studies. For example, Bai et al 33 found that the mean annual N surplus in newly built solar greenhouse vegetable production in the Loess Plateau was 1354 kg N ha −1 . The N inputs and outputs of the wheat− maize fields (n = 18) and kiwifruit orchards (n = 430) were plotted as suggested by the EU Nitrogen Expert Panel 34 (Figure S3).…”

Section: Resultsmentioning

confidence: 99%

High Nitrate Accumulation in the Vadose Zone after Land-Use Change from Croplands to Orchards

Gao

Wang

et al. 2021

Environ. Sci. Technol.

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Additional evidence indicates that the nitrate stored in the deep soil profile has an important role in regulating the global nitrogen (N) cycle. This study assessed the effects of land-use changes from croplands to intensive orchards (LUCO) on N surplus, nitrate accumulation in deep soil, and groundwater quality in the kiwifruit belt of the northern slope region of the Qinling Mountains, China. LUCO resulted in comparatively high N surplus in orchards (282 vs 1206 kg ha–1 yr–1, respectively). The average nitrate accumulation within the 0–10 m profiles of orchards was 7113 kg N ha–1, which was equal to approximately the total N surplus of 6 years of the orchards. The total nitrate stock within 0–10 m soil profiles of the kiwifruit belt was 266.5 Gg N, which was 3.5 times higher than the total annual N input. The nitrate concentrations of 97% of groundwater samples exceeded the WHO standard. The LUCO resulted in large nitrate storage in the vadose zone and caused serious contamination of groundwater. Our study highlights that nitrate accumulation in the vadose zone of an intensive land-use system is one of the main fates of surplus N and also a hotspot of nitrate accumulation.

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Section: Resultsmentioning

confidence: 99%

High Nitrate Accumulation in the Vadose Zone after Land-Use Change from Croplands to Orchards

Gao

Wang

et al. 2021

Environ. Sci. Technol.

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“…Greenhouse is the most suitable facility for continuous growth of tomatoes because of its precise regulation of the condition of water, heat, and fertilizer. To achieve a higher yield, tomatoes are generally cultivated with a greater degree of management, larger input of nutrients, and more precise irrigation, especially in China, where smallholder farms dominate. − Based on the principle of diminishing returns, continuous application of fertilizers hardly improved the yields and nutrient use efficiency of tomato, but caused a series of environmental pollution stemming from the leaching, runoff, and volatilization of excessive nutrients . Therefore, novel nonfertilization measures to promote tomato production as well as to ensure farmers’ income are critical for the development of sustainable agriculture.…”

Section: Introductionmentioning

confidence: 99%

Seaweed Extract Improved Yields, Leaf Photosynthesis, Ripening Time, and Net Returns of Tomato (Solanum lycopersicum Mill.)

et al. 2020

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Overuse of chemical fertilizers in the intensive greenhouse tomato cultivation system has limited the increase of plant production. Nowadays, seaweed extract has been gradually applied in agriculture as an effective way to achieve a higher yield of crops, but its effects on tomato cultivation have not been fully explored. In this study, a greenhouse experiment was conducted in Shandong province of China with a novel seaweed extract (SES) originated from Sargassum horneri, to investigate the effects of different doses of SES (0, 30, 60, and 90 kg hm −2 ) on yields, quality, ripening time, and net returns of tomato. The results indicated that the application of SES significantly increased tomato yield by 4.6−6.9% compared to the control, which is attributed to the improved photosynthetic capacity of tomato leaves. The yields of tomato increased first and then decreased with increasing dosage of SES, and SES applied at the dose of 60 kg hm −2 achieved the highest tomato yield. Compared to the control, SES at 60 and 90 kg hm −2 significantly increased the hardness of tomato by 10.2 and 19.8%, respectively, and this can help to reduce losses during transportation and storage. Moreover, SES shortened the ripening time of tomato, and the coincidence between tomato harvest and sale price peak achieved a high net return.See https://pubs.acs.org/sharingguidelines for options on how to legitimately share published articles.a Mean values followed by the same lowercase letter were not significantly different at the 0.05 probability level based on one-way analyses of variance (ANOVAs) followed by Duncan's multiple range tests within the same column. ACS Omegahttp://pubs.acs.org/journal/acsodf Article https://dx.

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“…All nutrients important for plant growth have the form of cations or anions determining the level of electrical conductivity of the soil and the amount of nutrients that the plants can absorb. Scientific studies [9,13,20] show that a high value of electrical conductivity, leads to the need for a smaller quantity of fertilizers but a greater amount of pesticides for weed control. In the case of the analyzed samples, the highest value of the conductivity (807µS / cm) was obtained for agricultural soil, taken in November before the vegetation.…”

Section: Resultsmentioning

confidence: 99%

“…Nitrates and nitrites are substances widely used in soil fertilization, which increases the amount of nitrogen in the soil, nutrients and implicitly in food of animal origin. Nitrites are naturally present in soil, water, all plant matter, but also in food [8][9][10][11]. It can be found in small quantities and in polluted air.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Soils Parameters in Correlation with Vegetation Period

Neagu¹,

Soceanu²,

Birghilă³

2020

Rev. Chim.

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Soil is a complex ecosystem whose functionality is related to the links that exist between chemical, physical, biological parameters and microbial communities. Our purpose was to carry out an analysis of variance of chemical properties of the soil in relation to the vegetation period. The analysis of the soil gives us knowledge about the fertility status of the soil, which is closely related to the nutritional status of plants. The analysis involved urban soil, agricultural soil and greenhouse soil from Dobrogea area. Soil samples come from the urban area: Constanta, agricultural area: Ciocarlia de Sus and greenhouse:Cumpana. To estimate the seasonal changes in the soil, three periods were studied: before vegetation (sowing), after the vegetation period (harvesting), relative rest period (winter). The chemical parameters evaluated were: soil reaction pH (acidity degree), conductivity - as an indicator of the nutrients available in the soil (soluble salts), ion exchange capacity (cations and anions), organic matter (humus), nitrogen content (total nitrogen and nitrites), the amount of extractable iron. The pH values were in the range corresponding to the weak acid-neutral soil for all three types of sample soils, with slight variations from one period to another while the recorded conductivity values indicate that the analyzed soils belong to the category of non-saline soils. The analyzed soil samples presented low concentrations of nitrites and the assimilable iron content was in the range 48.81 - 259.12 ppm.

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Excessive nutrient balance surpluses in newly built solar greenhouses over five years leads to high nutrient accumulations in soil

Cited by 73 publications

References 49 publications

High Nitrate Accumulation in the Vadose Zone after Land-Use Change from Croplands to Orchards

High Nitrate Accumulation in the Vadose Zone after Land-Use Change from Croplands to Orchards

Seaweed Extract Improved Yields, Leaf Photosynthesis, Ripening Time, and Net Returns of Tomato (Solanum lycopersicum Mill.)

Analysis of Soils Parameters in Correlation with Vegetation Period

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