叶面喷施锌和钼盐对干旱胁迫下桑树生长和部分生理指标的影响  

Effects of Foliar Application of Zinc and Molybdenum Solution on Mulberry Growth and Some Physiological Parameters Under Drought Stress

作　　者：杨洪雷 吴华顺 马桑 尚春琼 刘利[1,2] 曹旭 程嘉翎[1,2] Yang Honglei;Wu Huashun;Ma Sang;Shang Chunqiong;Liu Li;Cao Xu;Cheng Jialing(School of Biotechnology,Jiangsu University of Science and Technology,Zhenjiang Jiangsu 212018,China;Jiangsu Key Laboratory of Sericultural Biology and Biotechnology,Zhenjiang Jiangsu 212018,China;Bureau of Agriculture and Rural Affairs of Xin'an County,Luoyang Henan 471800,China)

机构地区：[1]江苏科技大学生物技术学院,江苏镇江212018 [2]江苏省蚕桑生物学与生物技术重点实验室,江苏镇江212018 [3]新安县农业农村局,河南洛阳471800

出　　处：《蚕业科学》2020年第4期418-425,共8页ACTA SERICOLOGICA SINICA

基　　金：国家自然科学基金项目(31700527,31670306);现代农业产业技术体系建设专项(CARS-18);江苏省高等学校大学生创新创业训练计划项目(201910289049Y)。

摘　　要：为探究叶面喷施锌和钼溶液对干旱胁迫条件下桑树(Morus L.)生长和生理的影响,以中桑5801一年生扦插苗为试验材料,分别喷施不同浓度的ZnSO4和Na2MoO4溶液,经过20%基质饱和含水量干旱胁迫7 d后,分析试验苗的生长指标、组织含水量、光合色素含量、根叶可溶性糖及淀粉含量。结果表明,干旱胁迫抑制了桑树试验苗的株高、根的伸长、生物量、根含水量和淀粉含量,提高了根冠比、叶含水量、光合色素和可溶性糖的含量。与喷施H2O相比,经干旱胁迫后,喷施低Mo桑树的根冠比、光合色素含量均为最大,喷施高Mo桑树根的伸长显著受抑制。喷施Zn加低Mo后,正常浇水条件下的桑树叶片可溶性糖含量、各部分生物量提高幅度均为最大,干旱胁迫下植株生长速率最快,叶生物量和地上部分生物量较高,叶片可溶性糖含量最高,推测喷施Zn加低Mo可能有利于促进干旱胁迫下叶片的渗透调节能力,以利于地上部分的生长。In order to explore the effects of foliar application of zinc(Zn) and molybdenum(Mo) on growth and physiological parameters of mulberry(Morus L.) under drought stress, one-year Zhongsang 5801 saplings were sprayed with different concentrations of ZnSO4 and Na2MoO4 solution, and then growth parameters, water content in tissues, content of photosynthesis pigments, content of soluble sugar and starch in root and leaf were analyzed after 7 d drought treatment(20% soil water content). The results showed that drought stress inhibited shoot length, root elongation, biomass accumulation, and water and starch content in root, but increased root to shoot ratio, contents of water, photosynthesis pigments and soluble sugar in leaf. Compared with saplings sprayed with water, root to shoot ratio and content of photosynthesis pigments were the highest when the saplings were under drought stress after foliar application of low concentration of Mo solution, and root elongation of saplings was significantly inhibited after foliar application of high concentration of Mo solution. Content of soluble sugar in leaf and biomass of each part in saplings without drought stress increased the most after spraying solution of Zn with low concentration of Mo. Drought stress resulted in the highest growth rate, higher leaf biomass and overground biomass, and the highest content of soluble sugar in leaf. It is speculated that spraying solution of Zn with low concentration of Mo may promote osmotic regulation ability of leaf, which is benificial for the growth of overground part under drought stress.

关 键 词：桑树 锌 钼 干旱胁迫 生长 光合色素 可溶性糖 淀粉 

分 类 号：S888.2[农业科学—特种经济动物饲养]