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Simply put, allelopathy refers to an ecological phenomenon of plant-plant interference through release of organic chemicals (allelochemicals) in the environment. These chemicals can be directly and continuously released by the donor plants in their immediate environment as volatiles in the air or root exudates in soil or they can be the microbial degradation products of plant residues. The chemicals may interfere with survival and growth of neighboring or succeeding plants. Black walnut, eucalyptus, sunflower, sorghum, sesame and alfalfa are common examples of plants with allelopathic property as well as some staple crops such as rice, wheat, barley and sorghum.
Plants can emit chemicals that also discourage insects and pathogens. To maintain sustained productivity, knowledge of this form of plant interference on other plants and on disease causing organisms has been used in agriculture since prehistoric time by manipulating cropping pattern and sequence such as mixed cropping and crop rotation. However, use of numerous agrochemicals including a wide range of herbicides, pesticides, fertilizers and genetically modified high yielding crops has become the characteristic feature of modern industrial agriculture. Not only the sustainability of crop yield is called into question in this form of agriculture, the extensive long-term and often irreversible environmental degradation including ground water contamination and food safety associated with industrial agriculture are now of serious concern worldwide.
The objective is to report on the latest advances in allelopathy by inviting leading scientists to contribute in specific fields. The volume is organized under three major subsections: History of allelopathy, Allelochemicals, allelopathic mechanisms, and bioassays, and Application of allelopathy in agriculture and forestry. An emphasis is place on methodology and application, making it a truly practical reference.
Preface.- Introduction.- Allelopathy Research and Application in Sustainable Agriculture and Forestry.- Allelopathy: Advances, Challenges and Opportunities.- Allelopathy in Chinese Modern and Ancient Agriculture.- Allelochemicals in Plants.- Allelopathy: Full Circle from Phytotoxicity to Mechanisms of Resistance.- Mechanisms and Experimental Methodology.- Indirect Effects of Phenolics on Plant Performance by Altering Nitrogen Cycling: Another Example of Plant-Plant Negative Interactions.- Genomic Approaches to Understanding Allelochemical Effects on Plants.- Allelopathy from a Mathematical Modeling Perspective.- Progress and Prospect of Rice Allelopathy Research.- Rice Allelopathy Research in China.- Recent Advances in Wheat Allelopathy.- Sorgam allelopathy for weed management in wheat.- Allelochemicals in Pre-cowing Soils of Continuous Soybean Cropping and their Autointoxication.- Autotoxicity in Agriculture and Forestry.- Walnut Allelopathy: Implications for Intercropping.- Research and application of Allelopathic Growth Simulation in Agriculture and Forestry.- Utilization of Stress Tolerant, Weed Suppressive Groundcovers for Low Maintenance Landscaping Settings.- Allelopathy in Forested Ecosystems.- Index.