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当前位置: 首页 > 文章 > 氮素形态对核桃幼苗根系呼吸速率的影响 福建农林大学学报(自然科学版) 2021 (4) 503-509
Position: Home > Articles > 氮素形态对核桃幼苗根系呼吸速率的影响 Journal of Fujian Agriculture and Forestry University(Natural Science Edition) 2021 (4) 503-509

氮素形态对核桃幼苗根系呼吸速率的影响

作  者：
马彬;王世伟;热比古丽·亚森;李春萍;丁俊杰;薛泽政;李振瑜;林静芸;阿不都萨拉木·阿力木;古丽给娜·阿不都米力克
单  位：
新疆农业大学林学与园艺学院/新疆教育厅干旱区林业生态与产业技术重点实验室
关键词：
核桃;幼苗;氮素形态;根系;呼吸速率;
摘  要：
以新疆核桃主要栽培品种‘温185’的幼苗为试验材料,在控制氮素形态的条件下进行盆栽试验.采用离体根法,通过研究不同氮素形态下核桃幼苗各径级根系呼吸速率的差异,揭示氮素形态对根系呼吸速率的影响.结果表明:随着时节的变化,氮素形态处理下的根系呼吸速率呈先增加后下降的趋势,7月份达到最大值;比根呼吸速率随着根系径级的增加呈下降趋势（第1径级<第2径级<第3径级）,根表面积呼吸速率随着根系径级的增加而增高（第1径级>第2径级>第3径级）;根表面积呼吸速率（除5、7月份）和比根呼吸速率（除6、7月份）差异均达显著水平（P<0.05）;NH+4-N与NO-3-N的比例为1∶1时,根系呼吸速率最高.综上,各氮素形态处理对核桃幼苗的生长发育有利,能增加根长、根系表面积和体积,从而提高根系活力,促进根系呼吸.
作  者：
MA Bin;WANG Shiwei;Rebiguri Yasen;LI Chunping;DING Junjie;XUE Zezheng;LI Zhenyu;LIN Jingyun;Abdusalam Alimu;Gurigiina Abdumilic;College of Forestry and Horticulture,Xinjiang Agricultural University/Key Laboratory of Forestry Ecology and Industrial Technology in Arid Areas,the Education Department of Xinjiang;
关键词：
walnut;;seedling;;nitrogen form;;root system;;respiration rate
摘  要：
To investigate how the form of nitrogen(N) impacts root respiration rate, the main cultivation variety of Juglans regia in Xinjiang basin, ‘Wen185' walnut was cultivated under controlled N supply by pot experiment. Respiration rate of the excised seedling roots comprising 3 diameter classes were compared under different forms of N supply. The results showed that root respiration rates increased and then declined as the experiment proceeded, and surface respiration rate and specific root respiration rate reached their heights in July. Specific root respiration rate maintained a downward trend with the increases of root diameter class, with the lowest value being from the root under first diameter class and the highest value from the root under third diameter class while it was the opposite trend for specific root respiration rate, it was enhanced with the increases of root diameter class. Surface area respiration rate(except May and July) and specific root respiration rate(except June and July) were overall significantly different(P<0.05). Root respiration rate was maximized when NH~+_4-N and NO~-_3-N were applied at the ratio of 1∶1. Different forms of N were beneficial to the growth and development of walnut seedlings, which could increase root length, root surface area and volume, thus improve root activity and promote root respiration.

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