摘要
为了探讨宁夏中部风沙区有限灌溉条件下甘草的最适灌水次数和灌溉量,在田间条件下研究了不同灌水处理对甘草的生长发育规律以及叶片的净光合速率和蒸腾速率的变化规律.结果显示,不同灌水处理甘草的株高、叶面积和干物质积累量都有显著差异;随着生育期的变化光合速率、蒸腾速率等生理性状差异显著,灌水处理的株高、叶面积、光合速率、蒸腾速率和干物质积累量都显著高于不灌水的处理,灌水量在300 m3/666.7 m2且分3次灌的甘草具有植株高(最高可达25.2 cm),叶面积指数大(最大为2.8),光合作用强(最高值达到13.72μmol/(m2.s)和生物量大(达到9876.53 kg/hm2)等特征,是宁夏中部扬黄灌区人工种植甘草的适宜灌水技术,对宁夏中部土壤风蚀区植被覆盖度的提高具有重要的意义.
It was conducted that different irrigation amount level and irrigation times influence on glycyrrhiza growing development and photosynthesis rate and transpiration rate on the field to study the optimal water amount and irrigation times under limited irrigation in sandy Area of central Ningxia. The results showed that the differences among plant height and leaf area index and accumulation of dry matter of glcyrrhiza were remarkable under different irrigation amount and irrigation times. The differences of physiological characters such as photosynthesis rate and transpiration rate etc. was remarkable too with the plant growing developing, highest plant and leaf area index and photosynthesis rate and transpiration rate of water irrigated treatments were all higher than no water irrigated treatments observably. The treatment with maximum of plant height and leaf area index and photosynthesis rate and biomass was treatment irrigated 3 times with 300 ma/666. 7 m2 of amount irrigated water（the highest plant height of glycyrrhiza reached to 25.2 cm , the maximum of leaf area index was 2.8, the highest photosynthesis rate was 13.72μmol/（m2 · s） and the maximum of biomass was 9 876.53 kg/hm2）. In short, the irrigated 3 times with 300 ma/666.7 m2 of amount irrigated water could be optimation choice for artificial planting in Ningxia middle irrigation area of Yellow River. These were very significant to increase vegetation coverage and soil anti-erodibility in sandy Area of central Ningxia.
出处
《农业科学研究》
2009年第2期11-14,共4页
Journal of Agricultural Sciences
基金
国家"十一五"科技支撑计划项目(2006BAD15B05)
宁夏回族自治区科技攻关重点项目"道地沙生中药材种植资源利用与规范化种植技术研究与示范"
关键词
甘草
有限灌溉
风沙区
glycyrrhiza
limited irrigation
sandy area of central Ningxia
