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野牛草雌雄株对不同形态氮素的生理响应差异
引用本文:郭丽珠,孟慧珍,范希峰,滕珂,滕文军,温海峰,岳跃森,张辉,武菊英.野牛草雌雄株对不同形态氮素的生理响应差异[J].草业学报,2023,32(2):65-74.
作者姓名:郭丽珠  孟慧珍  范希峰  滕珂  滕文军  温海峰  岳跃森  张辉  武菊英
作者单位:1.北京市农林科学院草业花卉与景观生态研究所,北京 100097;2.西北大学生命科学学院,陕西 西安 710069
基金项目:北京市农林科学院科技创新能力建设专项(KJCX20210431);北京市农林科学院博士后科研基金(2020-ZZ-007);北京市农林科学院基金项目(CZZJ202210)
摘    要:为揭示野牛草雌雄株对氮素形态的偏好及生理响应差异,以野牛草克隆分株为材料,采用温室砂培盆栽方法,分析了硝态氮(N1)、铵态氮(N2)、铵硝混合态氮(N3)和对照(CK)处理对野牛草雌、雄株生长性状、生物量、叶绿素含量、叶片氮含量及氮代谢相关酶活性的影响。结果表明,雌株在N2处理时其生长性状、各部位生物量及地上生物量和总生物量均显著小于N1和CK,且还小于N3处理,表明铵态氮处理可能抑制野牛草雌株生长。N1处理下的雄株间隔子长度、间隔子直径与CK无显著差异但显著大于N2和N3,同时其匍匐茎节数、匍匐茎长度、根生物量、地上生物量及总生物量显著大于其他处理。野牛草雌、雄株的叶绿素a含量和叶绿素总含量均在N1处理时显著高于对照,但雌株在3种N形态处理之间没有显著差异、而雄株在N1时与N2或N3处理差异显著。野牛草...

关 键 词:野牛草  雌雄株  氮素形态  生物量分配  氮代谢相关酶
收稿时间:2022-01-18
修稿时间:2022-04-09

Physiological responses of female and male Buchloe dactyloides plants to different nitrogen forms
Li-zhu GUO,Hui-zhen MENG,Xi-feng FAN,Ke TENG,Wen-jun TENG,Hai-feng WEN,Yue-sen YUE,Hui ZHANG,Ju-ying WU.Physiological responses of female and male Buchloe dactyloides plants to different nitrogen forms[J].Acta Prataculturae Sinica,2023,32(2):65-74.
Authors:Li-zhu GUO  Hui-zhen MENG  Xi-feng FAN  Ke TENG  Wen-jun TENG  Hai-feng WEN  Yue-sen YUE  Hui ZHANG  Ju-ying WU
Institution:1.Institute of Grassland,Flowers and Ecology,Beijing Academy of Agriculture and Forestry Sciences,Beijing 100097,China;2.College of Life Science,Northwest University,Xi’an 710069,China
Abstract:The aim of this study was to explore the preference and responses of female and male buffalograss (Buchloe dactyloides) to different nitrogen forms, and provide technical data for optimal management of nitrogen fertilizer for B. dactyloides. Thus we investigated the effects of NO3--N (N1), NH4+-N (N2), NO3--N∶NH4+-N=1∶1 (N3) and a zero nitrogen treatment (CK) on growth traits, biomass, chlorophyll content, leaf nitrogen content and enzymes related to nitrogen metabolism of female and male buffalograss ramets in a glasshouse sand culture experiment. It was found that growth traits, biomass of different parts, aboveground biomass and total biomass of female buffalograss were significantly lower under the N2 treatment than under N1 and CK, with the result for N3 being intermediate between N1 and N2 treatment, indicating that treatment with NH4+-N alone may inhibit the growth of female buffalograss. Meanwhile, there was no significant difference between the N1 treatment and CK in spacer length and diameter of male buffolagrass plants, but values for the N1 treatment were significantly greater than those under N2 and N3 treatments. Additionally, stolon node number, stolon length, root biomass, aboveground biomass and total biomass of male buffalograss were significantly greater under N1 than other treatments. Chlorophyll A content and total chlorophyll content of female and male buffolagrass were greater under the NO3--N treatment than CK. However, there was no significant difference between the three N-form treatments for female buffalograss, but male buffalograss under the N1 treatment differed significantly from N2 and N3 treatments. In the NH4NO3 treatment, leaf nitrogen content and three nitrogen metabolism related enzymes activities of female buffalograss were the highest, however, those of male buffalograss were highest under the N1 treatment. These results indicate that both female and male buffalograss plants prefer nitrate nitrogen; female buffalograss plants were found to be extremely sensitive to NH4+-N as the sole nitrogen source and their growth was inhibited, but mixed supply with ammonium and nitrate nitrogen alleviated or even improved the physiological function of N metabolism of female buffalograss; this response was not observed in male buffalograss. In summary, significant differences in the response of female and male buffalograss plants to different forms of nitrogen were found. This information could form a theoretical foundation for development of a differential nitrogen management of female and male buffolagrass.
Keywords:Buchloe dactyloides  female and male  nitrogen form  biomass allocation  enzymes related to nitrogen metabolism  
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