U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 Horticultural Crops Research Unit: Corvallis, OR
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    Careers


        


                    Other
                        History
                                    Useful Links
                    HortHappenings News PageSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Pacific West Area Corvallis, Oregon Horticultural Crops Research Unit Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications

Title:   Author  item
                                            Tarara, Julieitem
                                            Lee, Jungminitem
                                            SKINKIS, PATRICIA - Oregon State University
  Submitted to: Northwest Center for Small Fruit Research Proceedings
                                    Publication Type: Proceedings
                                    Publication Acceptance Date: 11/28/2013
                                    Publication  Date: 11/28/2013
                                    Citation: Tarara, J.M., Lee, J., Skinkis, P.A. 2013. Is timing the key to good fruit phenolics?: year 3. Northwest Center for Small Fruit Research Proceedings. Proceedings of Northwest Center for Small Fruits Research.Interpretive Summary: This is a final report (year 3) for a NCSFR funded proposal on our findings to better understand the relationship between canopy management (via vineyard floor manipulation) and berry quality.
                                Technical Abstract: Research was conducted in a commercial vineyard in Oregon. The vineyard soil was managed in three ways to alter vine growth, including growing grass between the rows of vines, soil tilled to remain bare, and a combination of alternating tilled and grassed areas between vine rows. Grapevine yield was deliberately reduced or was left at its natural level. For each combination of fruit level and vineyard floor management, we measured the total area of leaves produced by the plant, how much sunlight was absorbed by the leaves, how much water was in the soil, and yield. Most importantly, we measured how much nitrogen, a plant fertilizer, was present in each part of the plant: the shoots, the leaves, and the fruit. More extensive measurements of fruit chemistry were conducted at harvest to assess the quality of the fruit for winemaking. Grass planted between rows of grapevines effectively reduced excessive growth of the vines by competing with the plants for nitrogen rather than for water, as had been previously thought. The effect on yield of the grass and bare soil was different in each year of the study, which is often the case in perennial crops. It is more difficult to predict yield based on the amount of nitrogen in a perennial compared with annual crops because in perennial crops, next year's fruit begins to form during the present year. Whether there was grass or bare soil between the rows of grapevines had a greater effect on the total amount of leaves produced by the vines than it did on yield. Fruit quality was not significantly affected by changing the level of fruit on the vine.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov