摘要
为明确种植模式、调亏灌溉与光能利用能力之间的关系,提高间作系统的生产能力,以幼龄期枸杞间作苜蓿和单作苜蓿为研究对象,设置充分、轻度、中度、重度四种水分模式,比较研究了苜蓿叶片光合特性和生物量对种植模式和调亏灌溉的响应。结果表明,相同种植模式时,苜蓿叶片光响应参数AQY、Pnmax和LSP随调亏程度的降低而增加,LCP和Rd随调亏程度的降低而降低。Pn、Tr和Gs随光照强度的增加先升后降,Ci随光强的增加而减小后趋于稳定;Pn、Tr、Gs和Ci总体随调亏程度的降低而降低,但Ci在重度调亏下高于中度调亏。随调亏程度的降低,苜蓿茎、叶含水量,茎叶比,干物质量随之降低,两种种植模式下,地上生物量均在充分灌溉时达最大值,其中J1为513.84 g/m^2,D1为518.84 g/m^2。相同水分处理时,苜蓿各个指标差异性在两种种植模式下均不显著。这表明在幼龄期枸杞间作苜蓿,对苜蓿生理生化过程、地上生物量影响不显著;两种种植模式下,水分是苜蓿光能利用与生产能力的主要影响因素。
In order to clarify the relationship between planting patterns,deficit irrigation and light energy utilization are regulated to improve the production capacity of the intercropping system,taking intercropping of young Wolfberry and Alfalfa and only planting Alfalfa as the research object,setting adequate,mild,moderate and heavy water treatment.The photosynthetic characteristics alfalfa leaves and biomass of alfalfa are response to planting patterns and regulated deficit irrigation.The results show that plant treatment is determined,the AQY,Pnmax and LSP of alfalfa are increased,and the LCP and Rd of alfalfa are decreased with a rise in irrigation lower limit.The Pn,Tr and Gs of alfalfa first rise and then fall with increasing light intensity.The Ci of alfalfa decreases with the increase in light intensity and then tends to be stable.The Pn,Tr,Gs and Ci of alfalfa decrease with the lowering of the irrigation lower limit.However,Ci is more than a moderately adjusted loss under heavy adjustment.With the lowering of the lower irrigation limit,the water content of the stolon and leave,ratio of stems and leaves,and the biomass of alfalfa decreases.In both planting modes,the aboveground biomass reaches a maximum at full irrigation,with J1 being 513.84 g/m^2 and D1 being 518.84 g/m^2.Moisture treatment is determined,each index of alfalfa under two cropping patterns are not significant differences.It shows that in the young plantation of Wolfberry Park,the wolfberry has no significant effect on the physiological and biochemical processes and aboveground biomass.Water is the main influencing factor of light energy utilization and production capacity under two planting patterns.
作者
苏鹏海
齐广平
康燕霞
王金恒
张正苹
李晓敏
蔡玲惠
赵敏
SU Peng-hai;QI Guang-ping;KANG Yan-xia;WANG Jin-heng;ZHANG Zheng-ping;LI Xiao-min;CAI Ling-hui;ZHAO Min(Water Resources and Hydropower Engineering College of Gansu Agricultural University,Lanzhou 730070,China;Gansu Jingtai Chuan Electric Power Irrigation Administration Bureau,Jingtai 730400,Gansu Province,China)
出处
《中国农村水利水电》
北大核心
2019年第8期71-75,82,共6页
China Rural Water and Hydropower
基金
国家自然基金项目(51669002)
甘肃省农业生物技术研究与应用开发项目(GNSW-2016-26)
甘肃省自然基金项目(1606RJYA251)
关键词
间作
调亏灌溉
苜蓿
光合特性
生物量
intercropping
deficit irrigation
alfalfa
photosynthesis
biomass
