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前言巴基斯坦有生产效能的林仅占总土地面积的1.3％,因此,木材的供求之间有很大的差距,薪炭柴更是极缺。天然气、燃油和煤只能解决所需能源的13％,牲畜粪和农作物秸秆也用作燃料,解决需能源的87％。大约有90％的农村人口和50％的城市人口依靠这些非商业性的燃料。家庭做饭和取暖所需木柴的总消耗量为16000000立方米,而国家森林只能提供250000立方米。昔日是薪炭柴源的荒地渐渐地变成光秃秃的裸地,在这些地区进行人工造林是建立预备林的唯一希望所在。世界各地都在试验研究干旱地区造林的各种技术,其中之一
Foreword Productive forest in Pakistan accounts for only 1.3% of the total land area. Therefore, there is a big gap between the supply and demand of timber and fuelwood is extremely scarce. Natural gas, fuel oil and coal can only solve 13% of the required energy, livestock dung and crop straws are also used as fuels to solve 87% of the energy needs. About 90% of rural population and 50% of urban population rely on these non-commercial fuels. The total consumption of firewood for home cooking and heating is 16 million cubic meters, while the national forest can only provide 250,000 cubic meters. In the past, the wasteland of fuelwood sources gradually turned into bare bare land, and afforestation in these areas was the only hope of establishing a reserve forest. One of these technologies is experimenting with afforestation in arid regions around the world