世界钾肥生产垄断局面及供应紧张形势

介绍世界钾肥生产的垄断局面和定价机制，以及未来钾肥供应紧张形势仍然难以改观的忧虑，披露了我国钾肥供应长期受制于人的困境。     

Growth chamber study of phosphorus applied as drilled granules or as seed coatings to wheat sown in soils differing in P-sorption capacity

The effect of seed coatings or drilled granules containing phosphorus (P) on the early growth of wheat was evaluated in a pot trial in two soils differing in P-sorption capacity. P as monocalcium phosphate (MCP) was applied in seed coatings (C) at rates of 0 (inert coating of diatomaceous earth), 5 and 10 kg P ha^–1 whereas drilled rates (D) of P were applied at 0, 5, 10, 20 and 40 kg P ha^–1 to wheat sown at the equivalent of 60 kg ha^–1. The soils used were an aquic haplustalf with low (LS) and a gibbsiorthox with high (HS) P-sorption capacities respectively. Both soils were deficient in P, having 7.3 and 13.1 ppm available P in the LS and HS soils respectively. Emergence was recorded and plant height was measured at regular intervals. Shoot and root dry weights and P contents were determined in the final harvest at 27 days after sowing.Emergence was significantly delayed only by C10. Cumulative plant height per pot of C5 was significantly greater than that of C0, C10, D0, D5 or D10 from day 17 onwards. The only drilled treatments to produce a significant increase in plant height over D0 were D20 and D40. Dry weights increased in the LS soil up to 20 kg P ha^–1 and up to 40 kg P ha^–1 in the HS soil. Whilst C10 suffered some injury during emergence which also reduced the early growth of that treatment, seed coating at 5 kg P ha^–1 resulted in more effective use of P than an equivalent drilled rate in both soil types, particularly with respect to plant height and root weight.     

Controlling phosphorus fixation in calcareous soils by using coated diammonium phosphate

In this paper, phosphorus fixation in calcareous soils is controlled by means of rosin-coated diammonium phosphate pellets, with several rates of phosphorus release. Four soils from arid regions in the Spanish south-east were chosen and separately treated with one of the following fertilizers: superphosphate (SP) or diammonium phosphate (DAP) coated with 0, 10 or 22% rosin with a dosage of 1000 Kg P/ha. After treatment, the soils were incubated for 8 months, in the course of which samples were taken to evaluate the evolution of P availability by means of the electroultrafiltration (EUF) technique.The results obtained show that the use of DAP with a 22% coating enables phosphorus fixation in calcareous soils to be controlled. The coating was sufficiently stable to last for the time it takes the crop to grow.     

水稻水,肥生产函数及优化灌溉模式

本文根据作物生长的动力学原理，结合控制灌溉田间试验，对水稻生长进行数值模拟计算，救是随时间而变的动态产量递推模型，然后采用系统分析方法，将动态产量转化随水，肥而变的产量模型（水，肥生产函数），并求得优化灌溉模式，实例分析了表明建议的数学模型是合理可行的。     

对化肥市场运行规律的探讨

分析了我国化肥市场“两年畅、两年滞、一年平”的运行规律以及化肥积压滞销的深层次原因，并提出了若干政策性建议。     

用废旧包装塑料生产包膜肥料的应用前景

采用废旧包装塑料充作为控制释放肥料的包膜材料国内外未见报道。北京化工大学专利采用特殊的高聚物三级结构，将废旧聚乙烯，聚丙烯，聚苯乙烯，聚氯乙烯制成包膜肥料，它们具有增产，节肥，省工，大自然中自行降解不防碍耕作等优点。     

广西壮族自治区小氮肥工业的现状、问题及对策

从全自治区石油化工的普查资料出发，对我区小氮肥工业的兴衰，十年的变化，面临的困难及采取的对策进行专题分析研究，以引起政府及有关部门的关注和支持，促进我区小氮肥工业的不断发展。     

对化肥粒度概念的一些认识

介绍了对化肥粒度概念的理解、化肥粒度对肥料产品质量的影响。建议磷复肥生产时，应加强产品粒度控制，以提高产品质量。     

小氮肥变换工艺流程的沿革

本文详细介绍了小氮肥变换工段从单纯的中温变换流程、中－低温变换流程，到中串低变换流程，再到全低变流程，中－低－低变换流程的沿革历史，着重指出变换工艺流程的沿革始终以各种新型的中、低温变换催化剂的成功开发为中心。另外，还简述了适合于各种工艺流程的变换催化剂，并指出了各变换流程运作中所存在的问题。最后，作者提出了自己的建议和看法。     

引进大型尿基复合肥生产装置的技术特点比较

介绍国内几种引进INCRO公司、KT公司、HYDRO公司的大型尿基NPK复合肥生产装置的工艺流程及技术特点,并分析了尿基NPK复合肥的生产及流程中输送、造粒、干燥、尾气处理等工序的技术特点,以期对我国复合肥技术开发商及生产厂家有所裨益。