TAILIEUCHUNG - Controlled-Release and Stabilized Fertilizers in Agriculture

This publication presents agronomic reasons which have led to the development of controlled-release and stabilized fertilizers. The characteristics, the advantages and the possible disadvantages of controlled-release and nitrification/urease inhibitors are discussed. Particular attention is given to problems of legislation, registration, methodology and standardization. Leading manufacturers and their product ranges are listed. Universities and institutes engaged in research on controlled-release fertilizers and nitrification/urease inhibitors and the fields of their main research activities, are indicated. A comprehensive bibliography is added | Improving Fertilizer Use Efficiency Controlled-Release and Stabilized Fertilizers in Agriculture Dr. Martin E. Trenkel This work has been commissioned by the Food and . . . MM Agriculture Organization of the United Nations. The designations employed and the presentation of material in this publication do not imply the expression of any opinion whatsoever on the part of the FAO concerning the legal status of any country territory city or area or of its authorities or concerning the delimitation of its frontiers or boundaries. Published by the International Fertilizer Industry Association Paris December 1997. Copyright. 1997 IFA. All rights reserved. ISBN 2-9506299-0-3 Copies can be obtained from IFA 28 rue Marbeuf 75008 Paris France Tel 33-1-53930500 Fax 33-1-53930545 546 547 Email ifamail@ Web http For further information on this publication Dr. Martin E. Trenkel Im Alten Kloster 76857 Eusserthal Germany Fax 49-6345-3449 Contents Summary 3 Acknowledgments 5 Chapter 1. Introduction 7 Chapter 2. Definitions of Slow and Controlled-Release and Stabilized Fertilizers 11 . Slow and controlled-release fertilizer 11 . Nitrification inhibitors 12 . Urease inhibitors 12 Chapter 3. Manufacturing Routes for Slow and Controlled-Release and Stabilized Fertilizers 13 . Slow and controlled-release fertilizers 14 . Nitrification and urease inhibitors 14 Chapter 4. Slow and Controlled-Release and Stabilized Fertilizers 15 . Their advantages 15 . The possible disadvantages of slow and controlled-release and stabilized fertilizers 17 Chapter 5. Types of Slow and Controlled-Release and Stabilized Fertilizers 19 . Slow and controlled-release fertilizers 19 . Nitrification and urease inhibitors - stabilized fertilizers 29 Chapter 6. Research 41 . Controlled-release fertilizers 41 . Nitrification and urease inhibitors - stabilized fertilizers 44 Chapter 7. Legislation and Methodology 47 . Registration of slow and .

• Nông nghiệp
• Stabilized Fertilizers
• Manufacturing Routes
• Nitrification inhibitors
• Urease Inhibitors