Finansiele implikasies van besproeiing, geintegreer met lowerbestuur, vir rooi wyndruiwe in die Robertson-wynvallei

[摘要] ENGLISH ABSTRACT: The financial decision-making environment within which wine-grape producers function ischallenging because of the complex interrelationships between yield, product price and inputrequirements. The complexity of farm systems is increased because production and financialdecisions are necessarily made under uncertainty. Various issues influence the resilience ofthe wine industry. The goal of this study is to determine the financial implications of irrigation,integrated with canopy management practices on red wine cultivars in the Robertson area.Canopy management and irrigation cost play an important role within the multi-faceted farmsystem regarding yield, quality and input cost. This necessitates that research be carried outwithin the context of a systems approach. In this manner the interdependence among thevarious components of the farm system, and the associated synergies can be captured.Farm management, as a field of research, is dependent on other disciplines that present analternative perspective to the research problem.Viticulture trials specifically focused on the impact of various irrigation and canopymanagement activities is being done on Wansbek farm. Nine treatments were tested atvarious combinations of soil water depletion levels and canopy management strategies. Thefarm is situated in Agterkliphoogte, an area in the Robertson valley. A multi-disciplinarygroup discussion was held to firstly obtain insight in the complex working of a farm. Secondlythe group discussion was used to gain insight into the application of the Wansbek trial dataand the setting of guidelines as to its application to determine the expected farm levelfinancial implications of the treatments. Dealing with complexity necessitates insight formvarious areas of expertise, which is achieved time efficiently within expert group discussions.A quantitative method is required to reflect the interrelatedness and dynamics of a wholefarm system in a user-friendly manner. Multi-period budget models present the ability toaccommodate the complexity associated with a farm through a sequence of mathematicaland accounting equations. The physical/biological interrelations and structure of the farmcan be modelled while the financial performance of various irrigation and canopymanagement strategies can be determined.Farm-level profitability is especially sensitive to yield and price of farm products. Thetreatments that showed the highest expected profitability, return relatively high yields andprices at relatively low production costs. The sprawling canopy management treatment at c.60% and c. 30% plant available water depletion levels returned the highest and secondhighest profitability at both gross margin per hectare and whole farm level. Scenarios wereincorporated to illustrate the expected impact of key variables and the capability of themodel. Key factors associated with the success of specific treatments could be identified.Results showed throughout that the balance between yield, price and input cost are thedetermining factor to profitability, rather than a focus on any particular one of these factors.

[发布机构] Stellenbosch University