Mapping plastic-covered greenhouse farming areas using high-resolution PlanetScope and RapidEye imagery: studies from Loukkos perimeter (Morocco) and Dalat City (Vietnam)

Acharki, Siham; Veettil, Bijeesh Kozhikkodan

doi:10.1007/s11356-022-23808-w

Cited by 6 publications

(2 citation statements)

References 38 publications

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“…Especially the minor clusters, which are composed of small-scale low-intensity greenhouse infrastructures, occupy a large overall fraction of the total cultivation coverage of 39%. These small-scale greenhouses have been largely overlooked in previous mapping endeavors based on conventional satellite systems due to their small spatial extent and scattered appearance 23,25,36,37 . Such small-scale greenhouse cultivations, as mapped here, are nevertheless crucial for a stock-taking of the phenomenon of global greenhouse cultivation in relation to a green agricultural transition towards more sustainable use of resources (land, water, inputs) and a growing concern about the socio-environmental implications 26,38,39 .…”

Section: Discussionmentioning

confidence: 99%

Previously undetected small-scale greenhouses are an unknown environmental threat

Tong

Zhang

Fensholt

et al. 2023

Preprint

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Greenhouse cultivation has been expanding rapidly in recent years, being crucial for food security but raising environmental concerns. Yet, currently little knowledge exists on its global extent and possible drivers of the expansion. Here, we present a global assessment of greenhouse cultivation and map 1.3 million hectares of greenhouse infrastructures in 2019 using commercial satellite data at 3 m resolution, including both large and small scale greenhouse infrastructure. We show that only 61% are concentrated in large greenhouse clusters, and that the remaining 39% are small-scale greenhouse cultivation, which are challenging to detect with public satellite data. By studying the temporal development of the 65 largest clusters (> 1500 ha), we show a surge in greenhouse cultivation in the Global South since the early 2000s, including a dramatic increase in China, which accounts for 60% of the global coverage. Our assessment raises awareness that the true extent of areas polluted by greenhouse plastic is much larger than previously thought, with wide-ranging implications on environmental and socioeconomic conditions.

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Section: Discussionmentioning

confidence: 99%

Previously undetected small-scale greenhouses are an unknown environmental threat

Tong

Zhang

Fensholt

et al. 2023

Preprint

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“…Assuming that 90% are free-draining, as in southern Europe [2], there are an estimated 16,000 ha of free-draining substrate-grown crops in Turkey. Given the rapid expansion of plastic greenhouses in North Africa, Asia, and Central America [4][5][6], it is likely that internationally there is an appreciable additional area of greenhouses with free-draining substrate.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Methods to Determine Nutrient Uptake of Tomato Grown in Free-Draining Perlite Substrate—Key Information for Optimal Fertigation Management

Cedeño,

Magán,

Thompson

et al. 2024

Horticulturae

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Two methods were compared to determine crop nutrient uptake by tomato crops in free-draining perlite substrate. They were the nutrient balance method (applied minus drained) and the dry matter method (DM) (nutrients in plant material). Uptake of N, P, K, Ca, Mg, and S was determined using both methods, in three consecutive tomato crops planted in the same perlite. Nutrient uptake determined using the balance method was consistently higher than with the DM method. Relative differences (balance minus dry matter, with respect to the DM method) were N: −1 to 16%, P: 27–45%, K: 14–46%, Ca: 17–87%, Mg: 28–111%, and S: 15–65%. There was a clear tendency for the difference between the methods to reduce with successive crops. The differences between the methods were reduced when the measured retention of nutrients in the perlite substrate and estimated nutrient retention in roots (using a model) were included. However, these data did not explain all of the observed differences between the two methods. Various retention and loss processes may explain the differences. The results suggest that the DM matter method estimates nutrient uptake by the crop, and the balance method estimates nutrient consumption by the cropping system.

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Pixel-based mapping of open field and protected agriculture using constrained Sentinel-2 data

Cecilia¹,

Tom²,

Stamm³

et al. 2023

ISPRS Open Journal of Photogrammetry and Remote Sensing

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Mapping plastic-covered greenhouse farming areas using high-resolution PlanetScope and RapidEye imagery: studies from Loukkos perimeter (Morocco) and Dalat City (Vietnam)

Cited by 6 publications

References 38 publications

Previously undetected small-scale greenhouses are an unknown environmental threat

Previously undetected small-scale greenhouses are an unknown environmental threat

Comparison of Methods to Determine Nutrient Uptake of Tomato Grown in Free-Draining Perlite Substrate—Key Information for Optimal Fertigation Management

Pixel-based mapping of open field and protected agriculture using constrained Sentinel-2 data

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