Diatomite as a kind of biogenic siliceous sedimentary rock is widely distributed in the world, but less with high economic values. China, abundant in diatomite resource, is one of major diatomite producers. In diatomite product structures, however, China has a big gap. As power saving and environment requires, China's diatomite product structures will be largely improved. The dominant developing trends for the diatomite industry include top-quality diatomite filtration, functional fillings and compound materials, insulation materials, water treatment agents and absorbent, and purification materials. China's diatomite industry must focus on extensive utilization, renovation and industrial platform construction.

This paper comprehensively analyzes the insufficiencies in protecting and planning the basic farmlands, presents some views regarding the planning system, adjustment principles and controlled partition in the new general land utilization planning. Our study indicates that every national-, provincial-, municipal-, and town-level plannings shall embody the basic farmland layouts which can not be decreased in the mean levels during adjustment. The controlled partition can be classified into two types, the basic farmland protection zone and basic farmland dense zone. Rational farmland layouts and controlled partition are a key means to maintain the scientificity and practicability of planning.