摘要
地下滴灌是节水灌溉的一种重要模式。以一年生‘红盖露’苹果幼苗为试材,设表层滴灌、中层滴灌(7cm)、深层滴灌(14cm)3种灌水处理,在灌水量一致的情况下,研究了不同深度滴灌对其生长及生理特性的影响。结果表明:处理周期内,深层滴灌与表面滴灌相比苹果幼苗的光合特性和根系活力降低,而根冠比和水分利用效率升高;中层滴灌与表面滴灌相比苹果幼苗的光合特性升高,根系活力未发生显著变化而水分利用效率降低。总之,三种滴灌深度中层滴灌植株生理状态良好灌水利用效率高,是比较理想的埋管深度。
Subsurface drip irrigation is an important model of water-saving irrigation.One-year-old ＇Gale Gala＇ apple trees grafted onto Malus hupehensis Rehd.were used to research the effects of drip irrigation in different depths on plants growth and water-use efficiency.Three treatments were executed： surface drip irrigation（served as control）,middle（7 cm-underground） drip irrigation and deep（14 cm-underground） drip irrigation.The results showed that： compared with the surface control drip irrigation,the deep drip irrigation reduced the photosynthetic characteristics and root activity,but increased the root-shoot ratio and water use efficiency;the middle drip irrigation improved the gas exchange parameters and unchanged the root vigor and reduced water-use efficiency.In conclusion,the middle depth drip irrigation was much more benefit to apple trees vegetative growth and irrigation water-use efficiency than the other two irrigation regimes,which can be widely used in arid and semi-arid areas.
出处
《节水灌溉》
北大核心
2012年第3期29-32,共4页
Water Saving Irrigation
基金
国家苹果产业技术体系"生物技术与抗性育种岗位"(CARS-28)
西北农林科技大学唐仲英育种基金"优质抗性苹果新品种的选育"(A0906)
关键词
地下滴灌
根冠比
光合特性
水分利用效率
subsurface drip irrigation
root-shoot ratio
photosynthesis
water-use efficiency
