
值物营养与肥料学报2015,21(3):709-718 Journal of Plant Nutrition and Fertilizer
doi:10. 11674/zwyf.2015.0318 http://www.plantnutrifert.org
番茄穴盘苗组织NO,-N阐值的初步研究
梁欢,尚庆茂·
(农业部园艺作物生物学与种质创制重点实验室,中国农业科学院蔬菜花卉研究所,北京100081)
照等因索的影响。因此,研究不同品种、施肥和外界环境条件下番茄(LycopersiconesculentumMill.)幼苗的组织先采用穴盘育苗试验,以番茄17个主栽品种为试材,采用水杨酸-硫酸比色法测定了不同组织NO,-N含量。在该试验基础上,选其中两个品种('佳红4号'和中杂105号')继续进行穴盘育苗试验。设施N(26、210、840 mg/L),P(4,31248mg/L),K(29、2341875mg/L),温度(32℃/22℃、28℃/18℃、20℃/10℃),光照(不遮荫 50%避荫),灌水时间(灌水后2h取样、灌水后10h取样、灌水后24h取样)6因素多水平试验,测定处理后番茄“6N【O
同一组织不同品种间NO,-N含量变化范围为2.8
L,均达到差异极显著水平;与正常对照相比,氮盈余
供应可使组织NO;-N含量提高1.86倍,而亏缺供应使组织NO,-N含量降低了97.3%;磷、钾亏缺供应、低湿、弱光条件下番茄幼苗组织NO,-N含量呈降低趋势,最大降低幅度达49.6%,磷、钾盈余供应、高温、灌水时间则因组
茄17个品种不同组织NO;-N含量为基础值,以环境条件作用最大增幅和最大减幅进行校正,获得番茹幼苗组织 N0-N含量阔值,即下胚轴1.75~2.72g/L、基2.07~4.04g/L、第1叶位叶柄2.18~4.83g/L、第1叶位叶片 0.62~1.52g/L、第2叶位叶柄2.31~5.10g/L、第2叶位叶片0.73~1.50g/L、第3叶位叶柄2.79~4.09
g/L、第3叶位叶片0.40~1.53g/L、第4叶位叶柄2.44~4.20g/L、第4叶位叶片0.40~2.13g/L。关键词:香茹幼苗;穴盘;NO,-N属值
中图分类号:S625.5*4;S641.2
文献标识码:A
文章编号:1008-505X(2015)03070910
Preliminary study on NO,-N threshold in tomato seedlings grown in plug tray
LIANG Huan, SHANG Qing-mao'
( Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture; Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081 , China)
Abstract: [Objectives] The NO, -N threshold was an interpretation standard for N status and an important basis for vegetable seedling nutrient site-specific management, influenced by the cultivar, fertilizer, temperature, light intensity and other factors. Therefore, the NO, -N content change degree in tissues of tomato seedlings( Lycopersicon esculentum Mill. ) under different varieties, fertilization and environmental conditions was studied, in order to obtain a NO, -N threshold in tissues of tomato plug seedlings. [Methods] Firstly, 17 tomato cultivars were used as materials to analysis the NO, -N content in different tissues by salicylic acid-sulfuric spectrometry. Then, 'Jiahong No.4' and Zhongza No. 105' were chosen from the 17 cultivars to start the second plug tray experiment. The treatments include: three NPK rates(N 26, 210 and 840 mg/L, P4, 31 and 248 mg/L, and K 29, 234 and 1875 mg/L); three temperatures (32°℃/22℃, 28℃/18℃ and 20℃/10℃, day/night); two light intensity conditions(no shaded and 50% shaded) ; sampling times (2, 10 and 24 h after watering). The NO, -N contents in different
收稿日期:20140217
接受日期:2014-10-16
网络出版日期:2015-02-04
国(000((100
农业科学院科技创新工程(CAAS-ASTIP-IVFCAAS)资助。
作者简介:桑欢(1990—),女,山西临汾人,硕士研究生,主要从事截菜苗期发育调控方面的研究。E-mail:lianghuanconf@126.com
+通信作者E-mail;shangqingmao@ caas.cn
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