That is to say , there was enrichment tendency for phosphorus , especially for po , with the increase of soil fertility . pi mainly occurred in ca - p forms in which ca10 - p made up most in 58 % ~ 61 % , while the amount of ca2 - p was very lower . po exists mainly in the form of mid - labile po ( around 66 % ~ 69 % ) 在磷素的各种形态中，无机磷形态以钙磷为主，其中以难溶性的ca _ ( 10 ) - p占大多数，达58 - 61 ，而有效性强的ca _ 2 - p等较少；有机磷形态以中度活性有机磷为主，占66 - 69 。
Tio _ 2 has been known as an n - type metal oxide semiconductor and an important inorganic function material . it can be used in fabricating medium material , photocatalytic films , reducing reflect coat , gas sensor , etc . tio _ 2 films had excellent performance with photocatalysis , resisting photo erode , difficult dissolution in acidity condition , innocuity and stabilization in light and soon on Tio _ 2是n型金属氧化物半导体，是一种重要的无机功能材料，可用于制作电介质材料、光催化薄膜、减反射涂层、气敏传感器等。 tio _ 2薄膜具有优异的光催化性能，抗光腐蚀，在酸性条件下难溶，对光稳定，无毒等。
Affiliated to our company , there are 2 branch companies craft factory and 1 computer server co - location center . rare refractory metal manufacturing company : company unit production equipments including the four high mills introduced from russia , home - made duo mill and narrowband mill , 400kg pneumatic hammer , punch , grinder and lathe , etc . ; a foot set of complete flow has been formed from the processing of product cog to finished product 公司下设4个分公司：星元稀有难溶金属加工有限责任公司，是以生产钨钼钽锆铌钛镍等难熔金属材料及其制品为主的规模企业晨光印务有限责任公司，是集铝箔袋高温蒸煮袋抽真空袋及各类食品包装袋的设计制作印刷覆膜等专业化生产企业。
Ps - mpm was prepared by improved microsuspension polymerization . product structure , particle size and magnetic properties , were characterized and the reaction mechanism was analyzed . such influencing factors as the indissoluble assistant , the dispersant agent , the surfactants , the amount of initiator and the stirring speed were surveyed 本文采用了一种难溶助剂，用改进了的微悬浮聚合法制备出了聚苯乙烯磁性高分子微球，对产物进行了结构、粒径、磁性能的表征，分析了反应机理，并探讨了难溶助剂、分散剂、表面活性剂、引发剂用量、搅拌速度等因素对磁性高分子微球性能的影响。
This paper discusses how the silicate bacteria affect potassium releasing from minerals , especially the function mechanism during the interaction between bacterial and minerals ; the paper emphasize the problem such as the utilization of silicate bacteria to release significant amounts of potassium from soil minerals in the karst area , and at the same time the utilization of the silicate bacteria in the agriculture of karst area is discussed 主要探讨矽酸盐细菌的解钾作用，以及使难溶性矿物态钾转化为速效性钾的作用机理；同时在研究矽酸盐细菌解钾作用机理问题的基础上，重点探讨了喀斯特环境中利用矽酸盐细菌活化土壤中的矿物钾元素的问题，特别是矽酸盐细菌在喀斯特环境中农业上的利用。
The low solubility of calcium zincate produced from the chemical reaction of zinc oxide and calcium hydroxide in alkaline solution can improve the cycling life the zinc electrode , and the discharge capacity will tend to be stable . furthermore , the effects of la2o3 additives on the electrochemical performances of zinc electrodes were investigated . the results shows that the addition of la2o3 , in zinc electrode can improve the area of reduction peak and the hydrogen evolution potential which means the cathodic hydrogen evolution reaction can be hindered 氧化锌与氢氧化钙在碱性溶液中化学反应生成的难溶于碱的锌酸钙可以使锌电极的循环寿命得到提高，放电容量也趋于平稳，此外还考察了氧化镧对锌酸钙电极电化学性能的影响，结果表明：添加适量氧化镧能明显改善锌电极的电化学性能，使锌电极的还原峰电位正移，电极反应可逆性得到改善，同时也可抑制锌电极析氢反应的发生，提高了锌电极的阳极电流，对阳极反应有一定的活化作用；同时还可以改善锌电极的放电特性，增加电极的放电容量。
