Fruit And Economic Evaluation Of Bio-diesel Tree Species

Energy shortage has been one of the:most important problems to every country in the world which have a direct impact to the sustainable development of economy and society. Due to non-renewability of traditional energy and its environment problems by utilizing it, it causes the energy crisis and ecology crisis to the world.However, bio-diesel is a kind of renewable, high-efficient and free-of-pollution energy, which has a great economic, social and ecologic influence to the society. Making use of the renewable energy such as biodiesel has become a common choice for every country. In China, the government attaches much importance to plant bio-diesel energy forests with legal, financial and policy support. Numbers of biodiesel energy forests had been continuously planted in some areas of our country according to the ecologic environment of each area. But people are still confused of the most suitable tree species planted in local and the benefit of planting biodiesel forest. Base on the current biodiesel forest planting situation, an evaluation was conducted, and combined with the investigation results to the fruit formation of Xanthoceras sorbifolia, Zanthoxylum bungeanum, and Aleurites fordii, the seed and oil yield and income of biodiesel tree species are predicted and estimated in this paper, the results made up as following:1.Bio-diesel trees must have many features such as widespread, well-adapted, high rate of out seeds, high rate of oil contend,low fees of planting. So Xanthoceras sorbifolia,Zanthoxylum bungeanum,Pistacia chinensis, Sapium sebiferum, Vernicia fordii, Swida wilsoniana, Jatropha curcas, Euphorbia tirucalli, Cocos nucifera, Elaeis guineensis are selected as bio-diesel tree species in our country.2.The low production of the most bio-diesel trees and the high price of the seed are leading to the high cost of the bio-diesel.The practical matter is to overcome the bottleneck which constraints the development and utilization of the bio-diesel trees, such as Eurytoma plotniko of Pistacia chinensis, low rate of fruit of Xanthoceras sorbifolia. Strengthening the seed breeding, expanding the cultivation to achieve the scale of intensive management, enhancing the seed yield of bio-diesel species,lowing the cost of raw materials,all of which must be done in order to make bio-diesel has a greater prospects for development,3. In the growth of the first 20 years,Xanthoceras sorbifolia goes into strong mature phase, which continues as long as 100 years,goes into the strong mature phase in the first 8, entering the aging period after 25～35 years,Aleurites fordii goes into the strong fruit period in the first 6 years, the fruits decline 30 years later. On the benefit period, Zanthoxylum and Aleurites fordii are earlier to start the benefit period but Xanthoceras sorbifolia gets the longest benefit period.4.On the benefit per unit, Zanthoxylum bungeanum gets the highest benefit, Aleurites fordii gets the minimum.The reason is that the seed of Zanthoxylum bungeanum with high additional value,which can be produced into bio-diesel, seed-case can be used as spices and drug, and its diesel is used as fertilizer additives.The seed of Aleurites fordii can be only produced into bio-diesel for the diesel's poinsonous,so the benefit only includes the section of the bio-diesel.5.On the yield of the seed per unit, Zanthoxylum bungeanum gets the highest yield, Xanthoceras sorbifolia is the second and Aleurites fordii gets the minimum. Because Zanthoxylum bungeanum cultivation has a long history, and has formed a production intensive business model, it yields higher. The Xanthoceras sorbifolia, Aleurites fordii facing the same problem is the lack of seeds, in a semi-wild-oriented state, extensive management, yield relatively low naturally, so cultivation management should be strengthened, seeds cultivated to achieve intensive operations.6.After the conparision of the farmland planting Feasibility of Xanthoceras sorbifolia,Zanthoxylum bungeanum, Aleurites fordii, the author discovered that Zanthoxylum bungeanum gets a higher economic benefits than other crops, so it can be planted in farmland. But Xanthoceras sorbifolia and Aleurites fordii cannot be planted in the farmland because they get a lower benifites than other crops.But they can receive a good yield if the two species were planted in mountainous region, or intercroped with other crops.