Potential Yield of Tropical and Subtropical Tree Crops through Small, Efficient Trees
The commercial yields of subtropical and tropical tree fruit and nut crops are low compared with highly developed crops like apple and orange.These trees are generally large and inefficient with low Harvest Indexes (portion of the annual growth increment in the edible, economic portion).Vastly higher yields are achievable by developing new cultivars with small, compact canopies that intercept more light and distribute it more equitably.Theoretical estimates of the conversion of light energy into assimilates suggest scope for substantially increased productivity.Furthermore, there is great potential to increase efficiency of conversion to the economic product (Harvest Index) by achievable, improved genetic (scion and rootstock) and cultural practices on high density orchards.Innovative, compact tree canopies will enable automation of orchard management operations, hence reducing costs, increasing efficiency and profitability.A better understanding of the biology for consistency of floral initiation, flowering and fruit set will overcome inconsistencies such as biennial bearing.Best management practices will minimize losses of potential yield.A concerted research effort is needed to greatly increase yield potential but this is achievable and will lead to improved productivity and profitability of subtropical and tropical tree fruit and nut production.
Tropical and subtropical tree crops Potential yield Theoretical yield Small trees Energy in fruits Mango Avocado Custard apple Macadamia Canopy management Light interception Harvest index
R.A.Stephenson J.C.Chapman J.Wilkie
Horticulture and Forestry Science, Agri-Science Queensland, Department of Employment, Economic Development and Innovation
国内会议
山东寿光
英文
17-32
2013-04-22（万方平台首次上网日期，不代表论文的发表时间）