Economic Losses Evaluation Of Forest Pests In Shaanxi Province

With the sustainable development of forestry in the national economy, the status and role of forestry are continuously improved, so the problem of forest diseases and pests become the focus of resource protection. In order to provide technical basis for the Shaanxi Provincial forest disastrous diseases and pests management action system, it is an urgent issue to evaluate and determine direct and indirect economic losses caused by forest diseases and pests reasonably.In this paper, forest vegetation of Shaanxi province serving as research targets, and based on the establishing evaluation system, in combination with current situation of different kinds of forest diseases and pests and date of economic losses, economic losses evaluation of major forest diseases and pests in Shaanxi Province were analyzed. Some results show as follows.(1) The present paper pointed out explicitly the forest plant disease prevention is a complete economic process, has the nature﹑the society and the economical three big attributes. It is guards the human environment right and the material interest through resistance natural disaster. The forest harmful biology economic loss's appraisal has bright contemporaneity, the scientific nature and objectivity.(2) In the forest plant disease economic losses define; this article proposed that determines by no means some living thing's biology characteristic, but take people's economic interest as the foundation, considered that the humanity material interest authority and the environment subsistence right whether receive the violation and the threat.(3) This research pointed out that the forest harmful biology disaster economic loss includes: A: Forest plants themselves suffer injury loss; B: Forest environment resources loss; C: Prevention expense investment loss. From the economic aspects, these three aspects name are direct economic losses, indirect economic loss and prevention investment.(4) The paper has established scientific direct economic losses and the indirect economic loss indicator system according to Shaanxi Province's special circumstances. The direct economic losses indicator system includes: A. each standing timber dies loss; B. forest growth quantity loss; C. forest quality loss; D. economic forest product loss. The indirect economic loss indicator system includes: A. maintain the water and soil function loss; B. solid carbon function loss; C. purifying air function loss. One of its characteristic is the scientific nature, the content and the structure is comprehensive, has reflected the forestry harmful biology economic loss true meaning objectively; the second characteristic is the independence, the forestry harmful biology appraisal target both has connectivity, and has its independence, the respective boundary is clear, the characteristic is obvious, the individuality is prominent, the meaning is clear, had guaranteed described the forestry harmful biology disaster economic loss each aspect content objectively; the third characteristic is the target is quite concise, clear, is advantageous for operation, statistics and measurement.(5) This article estimates with the scientific reckoning method, the Shaanxi Province forest pests area is about 934.98 million mu every year, and the direct economic losses are average 58071.25 million Yuan every year, in 2003 the direct economic losses were highest, amounted to 63032.23 million Yuan; During 2002-2007, sickness, the insect, the rat creates direct economic losses 35840.02 million Yuan every year, plant disease loses 5035.57 million Yuan, the insect pest loses 26711.81 million Yuan, the rat harm loses 4276.15 million Yuan, the direct economic losses of major forest pests were highest in 2003, amount to 43678.09 million Yuan, plant disease lost 5583.93 million Yuan, the insect pest lost 33208.46 million Yuan, the rat loses 4885.70 million Yuan; The direct economic losses analysis result which considered to Shaanxi Province ten area's main forestry harmful biology disasters indicated that Baoji yearly average loses was the highest, amounts to 4358.84 million Yuan, in 2003 lost 6127.51 million Yuan; During 2002-2007, Shaanxi Province main harmful biohazard creates yearly average indirect economic loss amounts to 9832.57 million Yuan, approximately 24 times higher than direct economic losses.(6) The economic loss analysis result of Shaanxi Province main forestry harmful biology disaster during 2002-2007 indicated: In each kind of harmful living thing created in the direct economic losses, economic forest plant disease creates the biggest proportion of economic losses, which is 9032.57 million Yuan every year, next is the silverfish and the poplar tree harmful insect, created the yearly average direct economic losses respectively are 10933.20 million Yuan and 6011.73 million Yuan; Causing the direct economic losses account for the proportion smallest is the pine needle harmful insect and the poplar tree food leaf harmful insect.