Intensity of Agro-pastral Land Use and Regional Change of Geo-ecosystems in Northeast Brazil

一般来说，巴西东北部（Nordeste）被划分为三个生态区，即达mata区、sertao区和agreste区。本研究从农业和放牧土地利用强度两个方面阐述了人类活动对各生态区区域生态系统的影响。除了前两年在干旱和半干旱地区（Ico和Crato）的调研和在塞阿拉州Fortaleza的腰果产区酿造业务调研外，今年我们还对aona da mata和agreste甘蔗种植区的制糖厂和土壤恶化情况进行了调研。结果表明，橡胶园、竹林和牧场的甘蔗田随着糖价的低垂而变化。此外，在Borbolema山区的格拉瓦塔，形成了由别墅住宅综合体（Prive）组成的周末度假胜地，很明显，斯塔马牧场（Haras）也位于格拉瓦塔周边地区。此外，我们还发现了利用农村剩余劳动力发展起来的缝纫工业城市。另一方面，由老火成岩构成的色陶土壤保水能力较弱，甘蔗带白沙现象等土壤劣化现象明显。如果产能下降被定义为沙漠化，那么即使是北欧航空公司也在平静地行动。由于申请出版资助，明年将以“Nordeste: the environment and landuse”为题发表。

Generally, Northeast Brazil (Nordeste) is divided into three ecological zones namely zona da mata, sertao, and agreste. THis study elucidates what kind of influence human activities gave to the regional ecosystem in each ecological zone, from the aspects of landuse strength by agriculture and grazing.In addition to researches in arid and semi-arid region (Ico and Crato) and investigation of cashew nut zone brewing business in Fortaleza of Ceara during past two years, we investigated it about the sugar manufacture factory and the soil deterioration of sugar cane cultivation region in the aona da mata and agreste in this year.As a result it became clear that, sugar cane field varied with hanging low of sugar price in rubber plantation, banboo vegetation, and ranch.And, in Gravata of Borbolema mountainous, the weekend resort which consisted of villa housing complex (Prive) was formed, and it became clear that studhorse ranches (Haras) are located in surrounding area of Gravata, too. Furthermore, we found the sewing industry city where developed by using surplus labor force in rural area.On the other hand water preservation power of the soil in sertao where constituted by old igneous rock was weak, and it became clear that deterioration of the soil to do including white sand phenomenon in sugar cane zone went along. If a fall of production capacity is defined as desertation, even Nordesute it is moving calmly.We will publish the results as "Nordeste : the environment and landuse" next year, because we apply grant-in-aid of publication.