Navigation Links
Nitrogen management studied in greenhouse pepper production
Date:1/31/2014

NEGEV, ISRAEL--As consumer demand for year-round fresh produce increases, vegetable and fruit producers are facing significant environmental and sustainability issues, and are being challenged to examine traditional production practices in order to improve product quality while limiting environmental impact. A recent focus on both the positive and negative effects of nitrogen applications has researchers across the globe working to find methods that can increase crops' "nitrogen use efficiency" (NUE) to contribute to more sustainable, responsible agricultural practices. A study published in HortScience contains strategies for increasing NUE in greenhouse bell peppers, and demonstrates how the environmental impact of intensive agriculture can be minimized without harming fruit yield or quality.

Nitrogen, the most important and widely used agricultural nutrient, is also a major environmental contaminant. In many regions increased levels of nitrate found in groundwater have been attributed to the high rates of nitrogen fertilizer applied to surrounding crops. But sufficient nitrogen--an integral part of protein and chloroplast structure and function in plants--is essential for plant growth and development. According to Hagai Yasuor of the Gilat Research Center in Negev, nitrogen deficiency has been studied on the majority of horticultural crops, but the effects of an oversupply of nitrogen are not as widely understood. Yasuor and colleagues designed a study to investigate ways to reduce environmental pollution by increasing nitrogen use efficiency in vegetables without negatively affecting fruit yield or quality.

The scientists used bell pepper (Capsicum annum L.) in a case study for intensive vegetable cropping. "Pepper production is becoming commercially important in various regions of the world, including Israel, Spain, southern Europe, and north Africa, where the crop is grown from fall to spring in greenhouses and net houses," the authors explained. They selected two pepper cultivars with different growth habits for the study, and drip-irrigated the greenhouse plants with solutions containing four different nitrogen concentrations. They then measured fruit yield, quality, and nutritional value of all plants.

"We found that maximum yields occurred when peppers were irrigated with N at 56.2 mgL-1," Yasuor said. "Higher concentrations of nitrogen loaded more nitrogen into the environment, while the 56.2-mgL-1 concentration was almost completely taken up and used by the plants." The experiments also showed that nitrogen treatments had no significant negative effect on pepper fruit physical or chemical quality, including sugar content and acidity. Additionally, reduced nitrogen application did not affect nutritional quality components of the pepper fruit such as beta-carotene and lycopene content, nor did it reduce total antioxidant activity.

"Our results demonstrate how the environmental impact of intensive agriculture can be minimized without harming fruit yield or quality by reducing nitrogen application level and adopting cultivars with improved nitrogen use efficiency," the authors concluded.


'/>"/>

Contact: Mike W. Neff
mwneff@ashs.org
703-836-4606
American Society for Horticultural Science
Source:Eurekalert

Related biology news :

1. Modern hybrid corn makes better use of nitrogen, study shows
2. Nitrogen pollution changing Rocky Mountain National Park vegetation, says CU-Boulder-led study
3. Scientists develop new carbon accounting method to reduce farmers use of nitrogen fertilizer
4. How much nitrogen is fixed in the ocean?
5. Researchers to study impacts of pollutant nitrogen on plant species diversity
6. Lower nitrogen losses with perennial biofuel crops
7. Nitrogen from pollution, natural sources causes growth of toxic algae, study finds
8. Global nitrogen availability consistent for past 500 years, linked to carbon levels
9. Nitrogen has key role in estimating CO2 emissions from land use change
10. Microbes capture, store, and release nitrogen to feed reef-building coral
11. Nitrogen fertilizer remains in soils and leaks towards groundwater for decades, researchers find
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/21/2017)... LONDON , February 21, 2017 ... um 70 Millionen US-Dollar wachsen. Nach einem Gespräch mit mehr ... es einige Hindernisse zu überwinden gilt, um diese Prognose ... ... unter anderem die Mobilisierung der finanziellen Mittel für die ...
(Date:2/13/2017)... , Feb. 13, 2017 Former 9/11 Commission ... Judiciary Committee, Janice Kephart of Identity Strategy ... Donald Trump,s "Executive Order: Protecting the Nation ... 27, 2017):  "As President Trump,s ,Travel Ban, ... has now essentially banned the travel ban, it is ...
(Date:2/8/2017)... BEDFORD, Mass., Feb. 7, 2017  Aware, Inc. (NASDAQ: ... services, today reported financial results for its quarter and year ... fourth quarter of 2016 was $3.9 million compared to $6.9 ... the fourth quarter of 2016 was $0.6 million compared to ... in the fourth quarter of 2016 was $0.5 million, or ...
Breaking Biology News(10 mins):
(Date:2/24/2017)... -- VWR Corporation (NASDAQ: VWR), the leading global independent provider of ... reported its financial results for the fourth quarter and full ... 4Q16 record quarterly net sales of $1.13 billion, ... 4Q16 EMEA-APAC segment net sales ... Americas net sales increased 2.5%, or down 0.9% on an ...
(Date:2/23/2017)... 23, 2017 /PRNewswire/ - The Fight Against Cancer Innovation ... (OICR) are pleased to report that Fusion Pharmaceuticals Inc. ... Johnson & Johnson Innovation – JJDC, Inc. (JJDC) as ... HealthCap, TPG Biotechnology Partners, and Genesys Capital, as well ... ...
(Date:2/23/2017)... ... February 23, 2017 , ... ... novo clearance to begin marketing the SPEAC® System, the Brain Sentinel® Seizure Monitoring ... home or in healthcare facilities during periods of rest. A lightweight, non-invasive monitor ...
(Date:2/23/2017)... -- Capricor Therapeutics, Inc. (NASDAQ: CAPR), a biotechnology company developing biological ... Linda Marbán, Ph.D, president and chief executive officer, is scheduled ... Cowen and Company 37th Annual Health Care Conference Tuesday, ... MA 29th Annual ROTH Conference ... ET) Dana Point, CA ...
Breaking Biology Technology: