| 西藏河谷农区灌水和中后期降雨对高产青稞耗水量与产量的影响(英文) |
| |
| 引用本文： | 侯亚红.西藏河谷农区灌水和中后期降雨对高产青稞耗水量与产量的影响(英文)[J].农业科学与技术,2016(3):530-534. |
| |
| 作者姓名： | 侯亚红 |
| |
| 作者单位： | 西藏自治区农科院农业资源与环境研究所,西藏拉萨,850032 |
| |
| 基金项目： | National Barley and Highland Barley Industry Technology System Program (CARS-05-01A).基金项目国家大麦青稞产业技术体系项目“青稞粮草双高增产技术集成与示范”(CARS-05-01A)子课题。 |
| |
| 摘 要： | 利用盆栽试验研究人工灌水及雨水对西藏河谷农区高产青稞耗水特性及产量的影响。试验材料为西藏青稞品种‘藏青25’,水分处理8个:全生育期正常水分、轻度水分胁迫、中度水分胁迫和重度水分胁迫理,以及灌浆前正常水分、轻度水分胁迫、中度水分胁迫和重度水分胁迫处理后灌浆期以后雨水灌溉。试验结果表明,土壤含水量越大,青稞耗水量越大,拔节期及灌浆期是青稞耗水量最大的时期。全生育期土壤水分胁迫会降低青稞的生物量及产量,轻度水分胁迫、中度水分胁迫、重度水分胁迫与正常水分处理相比生物量下降了29.9%、41.7%、47.6%,单株产量下降了15.8%、43.7%、57.2%。但前期水分胁迫灌浆期后雨水灌溉对青稞的生长受到促进,生物量和产量增大,与长期水分胁迫相比生物量增长了13%、75.8%、128.1%、157.8%,产量增长了42.8%、84%、201.6%和269.5%。雨水灌溉在后期对青稞进行了补偿生长,水分利用率也相应提高。因此,在适当的水分胁迫(50%～65%土壤田间持水量)下,利用雨水补充灌溉,可以提高西藏高产青稞‘藏青25’的水分利用率,增加产量。
|
| 关 键 词： | 西藏河谷 水分胁迫 降雨 耗水特性 青稞产量 |
Effect of Irrigation and Rainfall on Water Consumption Characteristics and Yield of High Yield Highland Barley in Tibet River Valley |
| |
| Abstract: | This paper was to study the effect of irrigation and rainfal on water con-sumption characteristics and yield of high yield highland barley in Tibet river val ey. In pots, highland barley-25 of Tibet was used as the test material to provide eight water stress treatments: normal water, slight water stress, middle water stress, and severe water stress in two environmental conditions (the whole growth period water stress and the rainwater irrigation after fil ing stage). Test results indicated that wa-ter consumption increased with soil water rise. The maximum consumption of water was at the joining stage and fil ing stage. And then, the results showed that under rainwater irrigation treatment, the more the soil moisture was, the more the water consumption was. The water stress in whole highland barely growth period reduced biomass and yield. Compared with that of normal water treatment, biomass of slight water stress, middle water stress and severe water stress treatment was decreased by 29.9%, 41.7% and 47.6%, respectively, and yield of the three treatments was decreased by 15.8%, 43.7% and 57.2%, respectively. But rainfal after fil ing stage was beneficial to biomass and yield of highland barely. Compared with water stress on whole growth period, the biomass and yield of rainfal treatments after the fil ing stage were increased by 13%, 75.8%, 128.1%, 157.8% and 42.8%, 84%, 201.6%, and 269.5%. The results indicated that biomass and yield of rainwater irrigation after the fil ing stage had compensatory effect for highland barley growth under water stress, and could improve the water use efficiency. Therefore, properly rainwater us-age is beneficial to the increase of yield and water use efficiency of Tibet highland barley-25 under water stress. |
| |
| Keywords: | Tibet river val ey Water stress Rainfal Water consumption character-istics Barley yield |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
