寒旱农业科学2024，Vol.3Issue(8)：740-746,7.DOI:10.3969/j.issn.2097-2172.2024.08.008
不同氮处理对切花玫瑰生长和光合特性及产量的影响
Effects of Different Nitrogen Treatments on Growth,Photosynthetic Characteristics and Yield of Cut Flower Roses
摘要
Abstract
In order to select suitable nitrogen application rate,effects of different nitrogen application rateon growth,yield and photosynthetic characteristics of cut flower rose in Lanzhou New District were studied.Using Roselle rose as experimental material,5 nitrogen application rates(0,600,900,1 200,1 500 mg/L)were set to determine the effects of different nitrogen concentrations on growth,photosynthetic characteristics and yield of cut flower roses.The results showed that the plant height and pedicle length increased with the increase of nitrogen concentration.Stem diameter,leaf width,internode number,flower transverse diameter,flower longitudinal diameter,contents of chlorophyll a(Chl a),chlorophyll b(Chl b),chlorophyll a+b(Chl a+b),net photosynthetic rate(Pn),stomatal conductance(Gs)and transpiration rate(Tr)all increased first and then decreased.Intercellular CO2 concentration(Ci)decreased first and then increased.Compared with no nitrogen application,the increase and decrease of each index were different under different nitrogen concentration treatment,it showed that nitrogen treatment had obvious concentration effect,and the effect was most obvious under 900 mg/L treatment in whichcontents of chlorophyll a(Chl a),chlorophyll b(Chl b),andchlorophyll a+b(Chl a+b)increased by 53.32%,37.98%,and 45.74%,respectively compared to the non-nitrogen control;the net photosynthetic rate of leaves(Pn)was 14.17 μmol/(m2·s),an increase of 73.47%compared to the non-nitrogen control;stomatal conductance(Gs)was 0.068 mol/(m2·s),an increase of 51.41%compared to the non-nitrogen control;transpiration rate(Tr)was 183.60 g/(m2·h),an increase of 40.49%compared to the non-nitrogen control;the intercellular CO2 concentration(Ci)of the leaves reached its lowest value at 619 μmol/mol,a decrease of 12.94%compared to the non-nitrogen control;the highest yield was 24 stems/m2,an increase of 33.33%compared to the non-nitrogen control.Therefore,the application of N at 900 mg/L can significantly improve the yield of fresh-cut rose,improve the quality of rose,and promote the photosynthetic capacity of Roselle,which is the best nitrogen application amount for fresh-cut Rosellerose in glass greenhouse.关键词
切花玫瑰/洛神玫瑰/施氮量/生长/光合特性/产量Key words
Fresh-cut rose/Roselle rose/Nitrogen application amount/Growth/Photosynthetic characteristic/Yield分类
农业科技引用本文复制引用
梁志奇,高博,彭权权,徐文珍,谭磊,赵婷,胡鑫祖,杨国荣..不同氮处理对切花玫瑰生长和光合特性及产量的影响[J].寒旱农业科学,2024,3(8):740-746,7.基金项目
国家玫瑰鲜切花全产业链标准化示范区(SFQ11-87). （SFQ11-87）
