民权县农区林业综合效益评价

以河南省民权县农区林业为对象，全面系统地分析了民权县农区林业的生态、经济和社会效益。据１９９１年调查，全县立木总资产７１５６．８１万元，立木年增值１９１１．５３万元；１９９１年全县林业总产值９９７６．８４万元；林业商品率５７．８％；林业直接为１．２３万人提供了就业机会。农区林业可以改善农田小气候；农林间作生物量比单纯农地提高５％～２０％，光能利用率提高了５％～２０％。直接为农用积肥提供了基质１．７６１万ｔ；和１９４９年相比，扩大耕地１５１２０ｈｍ２；生态条件改善使农业产值增加３４２４．４万元。民权林木为畜牧提供粗饲料１．３８５１万ｔ，为整个牧用粗饲料的２１．９５％，对畜牧业收入的贡献率为３２．６７％，可增加畜牧业产值３１２８万元；全县养蜂产值２９９万元；对畜牧业贡献率为３５．０８％。村社林可以改善人畜的生态环境；减少医药费开支６２６．８９万元。

IntegratedEvaluation of Farm Forestryin Minquan County of Henan Province

The aim of this paper was to show a comprehensive picture of the ecologicaleconomicsocial function of farm forestry in Minquan County of Henan Province.In Minquan County in 1992,the total stumpage valued 71.57 million Yuan or 100.24 Yuan per person;the annual increment values 19.12 million Yuan;the total forest income was 99.77 million Yuan,or 150.8 Yuan per capital accounting for 27.59% of the total rural income;forestry and related industry provided 12 300 job opportunity directly and 13 100 labor opportunity indirectly.Farm forestry could improve the microclimate of farmland;forestry provided 108 963.98 tons of organic materials for fertilizer for agricultural purpose;compared with that in 1949,the farmland was enlarged by 15 120 hm2;the average wind speed decreased,strong wind and sandstorm times were decreased;the soil fertility was improved obviously.1 385.5 tons or 21.95% of the total raw fodder provided by the forestry.Villiage forest could improve the living condition of the people and anim al there,including the reduction of medical expenditure,which estimated to value 6 268 900 Yuan.The natural resource utilization rate was increased.