Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Saving Water without Hurting Peach Production

21.11.2012
U.S. Department of Agriculture (USDA) scientists are helping peach growers make the most of dwindling water supplies in California's San Joaquin Valley.

Agricultural Research Service (ARS) scientist James E. Ayars at the San Joaquin Valley Agricultural Sciences Center in Parlier, Calif., has found a way to reduce the amount of water given post-harvest to early-season peaches so that the reduction has a minimal effect on yield and fruit quality. ARS is USDA's principal intramural scientific research agency, and the research supports the USDA priority of promoting international food security.

The valley has about 25,000 acres of peach orchards that must be irrigated throughout the summer. Early-season peaches are normally harvested in May, but require most of their water from June through September, a time when temperatures and demands for water are at their highest. Snow packs in the Sierra Nevada have traditionally been a sufficient water source for growers, but earlier snowmelts have made water more precious with each summer. Wells that supply the valley have had to reach deeper to meet increasing demands.

Ayars and ARS scientist Dong Wang, also based at Parlier, irrigated a 4-acre plot of early-season peach trees from March to the May harvest. From June to September, they gave the trees either 25 percent of the amount of water they'd normally receive, 50 percent of the normal amount, or 100 percent. The scientists measured soil water content once a week to be sure that even with periodic rainfall, trees were given appropriate deficit-irrigation treatments. They also used three types of irrigation systems: microspray, subsurface drip irrigation, and furrow irrigation, in which water is distributed in shallow canal-like rows near the trees. Defective fruit were counted and removed after each harvest.

The results showed that reducing post-harvest irrigation levels to 25 percent of the normal amount had negative effects on yield and fruit quality, but that giving 50 percent less water than normal had minimal effects on the following year's quality and yield. The subsurface drip irrigation systems tended to have the lowest yields within a given year, but differences were generally not statistically significant. The researchers also found that trees needed less pruning and maintenance because the deficit irrigation slowed plant growth.

The results of this study have been submitted to the scientific journal HortScience for publication.

Read more about this research in the November/December 2012 issue of Agricultural Research magazine.

Dennis O'Brien | EurekAlert!
Further information:
http://www.ars.usda.gov

More articles from Agricultural and Forestry Science:

nachricht Light green plants save nitrogen without sacrificing photosynthetic efficiency
21.11.2017 | Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign

nachricht Filling intercropping info gap
16.11.2017 | American Society of Agronomy

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: New proton record: Researchers measure magnetic moment with greatest possible precision

High-precision measurement of the g-factor eleven times more precise than before / Results indicate a strong similarity between protons and antiprotons

The magnetic moment of an individual proton is inconceivably small, but can still be quantified. The basis for undertaking this measurement was laid over ten...

Im Focus: Frictional Heat Powers Hydrothermal Activity on Enceladus

Computer simulation shows how the icy moon heats water in a porous rock core

Heat from the friction of rocks caused by tidal forces could be the “engine” for the hydrothermal activity on Saturn's moon Enceladus. This presupposes that...

Im Focus: Nanoparticles help with malaria diagnosis – new rapid test in development

The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.

Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

IceCube experiment finds Earth can block high-energy particles from nuclear reactions

24.11.2017 | Physics and Astronomy

A 'half-hearted' solution to one-sided heart failure

24.11.2017 | Health and Medicine

Heidelberg Researchers Study Unique Underwater Stalactites

24.11.2017 | Earth Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>