Applying nutrient dynamics to adjust the nutrient-water balance in hydroponic crops. A case study with open hydroponic tomato crops from Barcelona
(چکیده مقاله) :
Abstract :
Background: Global food production systems generate impacts such as eutrophication, caused by nutrient run-off
from agricultural exploitations and exacerbated by climate change. Hydroponic cultivation methods are
common in Mediterranean areas, although there is a gap in the literature with regard to their study. This study
aims to fill that gap, by assessing nutrient flows in hydroponic crops.
Results: The results showed that most of the nutrients were drained with the leachates (51% on average), a figure
which could be lower, if the nutrient supply were adjusted to the needs of the plants or if (closed hydroponic)
nutrient recirculation were implemented, without compromising the nutrient uptake of the plant. Moreover, the
study revealed that a significant quantity of nutrients was retained in the substrate (perlite) during the crop,
reaching average values of 5% of incoming calcium, 6% of nitrogen, and 7% of phosphorus. In the case of
phosphorus and calcium, a regression model is presented for the estimation of their retention in hydroponic
crops.
Conclusions: Although further studies will be needed to confirm the above trends, the study makes a significant
contribution to understanding the metabolism of nutrients in hydroponic crops and to finer adjustments of the
nutrient balance
from agricultural exploitations and exacerbated by climate change. Hydroponic cultivation methods are
common in Mediterranean areas, although there is a gap in the literature with regard to their study. This study
aims to fill that gap, by assessing nutrient flows in hydroponic crops.
Results: The results showed that most of the nutrients were drained with the leachates (51% on average), a figure
which could be lower, if the nutrient supply were adjusted to the needs of the plants or if (closed hydroponic)
nutrient recirculation were implemented, without compromising the nutrient uptake of the plant. Moreover, the
study revealed that a significant quantity of nutrients was retained in the substrate (perlite) during the crop,
reaching average values of 5% of incoming calcium, 6% of nitrogen, and 7% of phosphorus. In the case of
phosphorus and calcium, a regression model is presented for the estimation of their retention in hydroponic
crops.
Conclusions: Although further studies will be needed to confirm the above trends, the study makes a significant
contribution to understanding the metabolism of nutrients in hydroponic crops and to finer adjustments of the
nutrient balance
(توضیحات تکمیلی) :
(توضیحات تکمیلی) :
Description :
مقاله ISI انگلیسی اصلی
سال انتشار: 2020
فایل ISI انگلیسی اصلی ، با فرمت Pdf
تعداد صفحات فایل ISI انگلیسی اصلی: 10 صفحه
سال انتشار: 2020
فایل ISI انگلیسی اصلی ، با فرمت Pdf
تعداد صفحات فایل ISI انگلیسی اصلی: 10 صفحه
Authors / Descriptions(نویسندگان/توضیحات): مقاله ISI سال انتشار2020 \ David Sanjuan-Delmása,b,⁎, Alejandro Josac, Pere Muñozd, Santiago Gassóe, Joan Rieradevalla,f, Xavier Gabarrella
Sent date(تاریخ ارسال) :
1399/04/28 | 7/18/2020
Number of visits(تعداد بازدید):
607
Key words (کلمات کلیدی):
Fertigation , Phosphorus , Nutrient budget , Industrial ecology , Substance flow analysis , Substrate
Number of pages(تعداد صفحات) :
10
| نظرات کاربران در مورد این آگهی | |
|
در حال حاضر هیچ نظری ثبت نگردیده است .
|
|