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Title:: Effects of Regulated Deficitaerobic Irrigation on Growth Characteristics of Asparagus Seedlings

Author(s):: DING Xin1; YAO Bangsong1; 2; PEI Yi1; WEI Yafei1; LIAO Jiancheng1; TAN Liangping3; (1.College of Engineering,Hunan Agricultural University,Changsha,Hunan 410128；2.Hunan International Cooperation Base for Scientific and Technological Innovation of Ecological Remediation of Typical Agricultural Pollution and Protection of Wetlands,Changsha,Hunan 410128；3.Hunan Vegetable Research Institute,Changsha,Hunan 410125)

Keywords:: regulated deficitaeration irrigation; asparagus; agronomic traits; chlorophyll; water consumption

Abstract:: New variety ‘Ruili’ asparagus was used as the research object,and 10 treatments were designed with different soil water content as control conditions.Repeatedly,the aerobic instrument adopts XZCPK micronano bubble generating device,and the soil water content was determined by weighing method.The effects of regulated deficitaeration irrigation on agronomic traits,chlorophyll content and water consumption of asparagus in seedling stage were studied,in order to explore the effect of regulated deficitaeration irrigation on the growth characteristics of asparagus in seedling stage.The results showed that micronano aerobic irrigation could promote the plant height and stem diameter of asparagus in seedling stage,as well as the growth of roots,such as total root surface area,root mean diameter,root volume,root activity and rootshoot ratio.Compared with conventional irrigation,they increased by an average of 2567%,3781%,8608%,3250%,and 3400%,respectively.Micronano aerobic irrigation will increase the chlorophyll content of asparagus in seedling stage,with an average increase of 1948%.Regulated deficitaeration irrigation could be promoted and applied in greenhouse economic crops to develop waterefficient and efficient agriculture.