一、当前国际土壤农业化学研究尚处于相对静止时期 “农业化学”的范畴应该是属于应用研究科学。从它的发展历史看来,是以化学、物理学、植物生理学、微生物学的研究成果为基础的。国际上土壤农业化学的研究经历了一个缓慢发展时期,直至十九世纪中叶(1840年)以李比希(Liebig)“化学在农业及生理学上的应用”一书的问世,宣告了“矿质营养学说”的诞生,而进入了一个蓬勃发展时期。最近的一个多世纪来,对于矿质营养元素在土壤中的状态、含量、转化、移动,植物对矿质营养元素的吸收机理以及怎样用无机肥料(包括有机肥料)补充营养的不足,进行了大量的研究,并由此促进了农业生产的迅速发展。整个十九世纪下半叶,李比希学派的影响几乎控制了农业科学的全部研究。在美国,农业实验研究单位、农事试验场,大都由化学家来主持。李比希的影响首先 First, the current international agrochemical research is still relatively static period “agrochemical” category should belong to applied research science. It seems from the history of its development, based on chemistry, physics, plant physiology, microbiology research results. The international research on soil agrochemicals has undergone a period of slow development until the advent of Liebig’s “The Application of Chemistry in Agriculture and Physiology” in the mid-nineteenth century (1840), proclaiming the concept of “mineral nutrition” The birth, and entered a period of vigorous development. In the recent more than a century, a great deal of studies have been conducted on the status, content, transformation and movement of mineral nutrients in soil, the absorption mechanism of mineral nutrients by plants, and how to supplement nutrition with inorganic fertilizers, including organic fertilizers Research, and thus promote the rapid development of agricultural production. Throughout the second half of the nineteenth century, the influence of the Libby school almost dominated all the research in agricultural science. In the United States, agricultural experimental research units, agricultural test sites, mostly by chemists to host. Impact of Libby at first