增温和升高CO_2浓度对桑树幼苗的生长和叶片品质的影响  

Effects of elevated temperature and CO_2 concentration on growth and leaf quality of Morus alba seedlings

作　　者：曾贞[1] 郇慧慧 刘刚[2] 肖娟[1] 黄尤优[1] 胥晓[1] 董廷发[1] 

机构地区：[1]西南野生动植物资源保护教育部重点实验室/西华师范大学生命科学学院,四川南充637009 [2]四川省农业科学院蚕业研究所,四川南充637000

出　　处：《应用生态学报》2016年第8期2445-2451,共7页Chinese Journal of Applied Ecology

基　　金：四川省青年科技基金项目(2012JQ0045)资助~~

摘　　要：研究了增温(+2℃)、升高CO_2浓度(+300 ppm)及同时增温和升高CO_2浓度(+2℃和+300 ppm CO_2)处理60 d后1年生桑树幼苗的形态、生物量积累及叶片品质的变化.结果表明:与对照相比,增温显著增加桑树的基径、叶片数、总叶面积、叶干质量、叶干质量分数和可溶性蛋白含量,分别增加了9.9%、17.4%、23.0%、9.2%、10.1%和23.1%;升高CO_2浓度显著增加了桑树幼苗的茎干质量、根干质量和总干质量,比对照分别增加10.7%、15.9%和9.2%,但对幼苗的形态和叶片品质无显著影响;同时增温和升高CO_2浓度条件下,叶片数、株高、基径、总叶面积、叶干质量、根干质量、总干质量、叶片可溶性糖和粗蛋白含量均显著升高,与对照相比分别增加28.8%、9.1%、19.4%、32.6%、12.4%、17.2%、10.1%、45.8%和11.9%,但粗纤维含量显著降低16.8%.短期增温和升高CO_2浓度对桑树幼苗的生长发育和叶片品质有促进作用.To estimate the potential effects of climate change on the growth and leaf quality of Morus alba,one-year-old M. alba seedlings were exposed 60 d under four treatments,i.e.,elevated temperature（ ET,＋2 ℃）,elevated CO2concentration（ EC,＋300 ppm CO2）,elevated temperature and CO2concentration（ ETC,＋2 ℃ ＋300 ppm CO2）,and control treatment（ CK）. The results showed that basal diameter,leaf number,total leaf area,leaf dry mass,leaf dry mass fraction and soluble protein were 9.9%,17.4%,23.0%,9.2%,10.1% and 23.1% higher under ET than those under CK,respectively. EC significantly increased the stem,root and total dry biomass by 10.7%,15. 9% and 9.2% compared with CK,respectively,whereas leaf quality was similar between EC and CK. Compared with CK,leaf number,height,diameter,total leaf area,the leaf,root and total dry biomass,leaf soluble sugar content and crude protein content increased significantly by 28. 8%,9.1%,19.4%,32.6%,12.4%,17.2%,10.1%,45.8% and 11.9% in ETC while the leaf crude fibre content decreased by 16.8%. Our results indicated that climate change had a positive effect on the growth and leaf quality of M. alba in a short period.

关 键 词：叶片品质 气候变化 桑树 生长 

分 类 号：S888.2[农业科学—特种经济动物饲养]