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一、防护林的现状 对农业生产者来说,防护林的印象就是防御强风,减轻风害,而生产上对改善气象环境有贡献就不太清楚了。作者在北海道着手于防风的研究以前,对防护林也只有这种程度的知识。而参与农业气象研究以来,虽然打算来表述一般的理论、但是受到关于科学的防风机制的种种教育,在实践中对防风技术专心观察的结果,终于改变了对防护林的印象。 诚然,关于防护林的研究,在林业、农业气象领域很早以来就有很多的文献,因而,有对防护林关于防风的研究已经搞完的感觉。
I. Status of shelterbelts For agricultural producers, the impression of shelterbelts is to defend against strong winds and reduce wind damage, and it is not clear how production will contribute to the improvement of the meteorological environment. Before Hokkaido started his research on windbreak, he had only this level of knowledge about shelterbelts. Participating in agricultural meteorological research, though intending to formulate a general theory, all the education on the scientific windbreak mechanism has resulted in the change of the impression of the shelterbelt eventually. To be sure, many studies on shelterbelts have long been published in forestry and agricultural meteorology. Therefore, there is a feeling that the research on shelterbelt has been finished.