摘要
综述了间套复合群体水分利用的特征及其机理，展望了未来间套作研究的重点领域。间套复合群体总耗水量与单作耗水量的加权平均差异极小，但水分利用效率可较单作提高18％～99％，间套作有利于创造适宜作物生长发育的土壤水分环境。复合群体水分高效利用的主要原因包括：不同作物水分需求时空生态位差异、提水作用、特殊的冠层结构、高效的光合产物转移特点、提高蒸腾量占腾发总量的比例。未来研究重点领域包括：间套作物根系时空分布与水分间的互作作用，配对作物生化互作与水分利用效率的关系，根系提水作用的诱导和利用，基于地面改进的间套作水分高效利用技术和分根交替灌溉技术研究。
The characteristics and mechanism of water utilization in intercropping system are reviewed in this paper, and the key research fields related to intercropping in the future is prospected simultaneously. The difference between total water consumption in intercropping system and weighted average of water consumption in sole cropping systems is very limited, but the water use efficiency in intercropping system can be increased by 18% -99%. Intereropping system is in favor of providing an optimum soil moisture environment for crop development. The main causes for high efficient water utilization are as follows ： the difference of temporal and spaeial niche of water requirement by different crops, hydraulic lift, special canopy structure, high efficient biomass accumulation characteristic and higher ratio of transpiration to evapo-transpiration. The future research fields will lie on interaction between soft moisture and root space-time distribution in intereropping system, relation between biochemical mutual function of partner crops and water utilization, induction and utilization of hydraulic lift, water efficient utilization based on ground improvement and water-saving irrigation technology based on root divided alternative irrigation.
出处
《中国农业科技导报》
CAS
CSCD
2008年第4期11-15,共5页
Journal of Agricultural Science and Technology
基金
国家自然科学基金项目(30771264)
国家科技支撑计划项目(2007BAD89B17
2007BAD46B06)
甘肃省中青基金项目(3YS061-A25-021)资助
关键词
间套作
水分利用特征
水分利用效率
intereropping
characteristics of water utilization
water use efficiency
