不同施钾水平对苜蓿营养物质及抗蓟马性的影响

doi:10.16380/j.kcxb.2016.08.006

摘要/Abstract

摘要： 【目的】明确施钾是否能有效提高苜蓿对蓟马的抗性以及钾-营养物质-抗虫性之间的关系。【方法】以感蓟马紫花苜蓿Medicago sativa品种甘农3号（Gannong No.3）和抗蓟马紫花苜蓿品种甘农9号（Gannong No.9）为材料，设0, 6, 9, 12和15 g/m² （K₂O）5个钾水平，在大田蓟马为害高峰期，评价和测定了不同钾水平处理下苜蓿的受害指数、虫口数量、叶片钾含量、碳氮比和游离氨基酸变化。【结果】在第2茬中，随着钾水平的升高，甘农3号和甘农9号老叶和心叶的钾含量上升，可溶性糖和碳氮比升高，游离氨基酸含量下降，虫口数量无显著性差异，受害指数显著降低（P＜0.05），且在9 g/m²（K₂O）水平下最低。在第3茬中，甘农3号和甘农9号的受害指数、叶片钾含量、碳氮比及游离氨基酸的变化规律和第2茬相同，但虫口数量上升。第2茬和第3茬中，不同施钾水平下，苜蓿叶片钾含量与受害指数负相关但不显著（P＞0.05）。施钾后甘农3号的受害指数均低于未施钾甘农9号的受害指数。【结论】钾元素可通过提高苜蓿碳氮比，降低游离氨基酸的含量来提高苜蓿对蓟马的耐害性。在大田条件下，通过施钾管理来提高苜蓿品种对蓟马的耐害性是一种有效的措施。

关键词: 苜蓿, 钾肥, 蓟马, 抗虫性, 营养物质

Abstract: 【Aim】 To determine whether potassium application can effectively improve the resistance of alfalfa to thrips and the relationship between potassium, nutrients and resistance to thrips. 【Methods】 The changes in damage index, potassium content, thrips density, carbon to nitrogen ratio and free amino acid content in leaves of alfalfa (Medicago sativa) resistant to thrips (Gannong No. 9) and susceptible to thrips (Gannong No. 3) were evaluated and measured after application with different levels of potassium (0, 6, 9, 12, 15 g/m² K₂O) during the thrips damage peak in fields. 【Results】 The potassium content, soluble sugar content and carbon to nitrogen ratio in old and heart leaves of Gannong No.3 and Gannong No.9 increased while the free amino acid content decreased with the potassium levels increasing, and the thrips density showed no significant change in the 2nd cutting of alfalfa. The damage index of alfalfa decreased significantly after application with potassium (P＜0.05) and was the lowest at the potassium level of 9 g/m² K₂O. The damage index, potassium content, carbon to nitrogen ratio and the free amino acid content in leaves of the 3rd cutting of alfalfa displayed the same change trend with those of the 2nd cutting after application with potassium. However, the thrips density increased as the potassium concentration increased. Correlation analysis indicated that the potassium content in leaves of the 2nd and 3rd cuttings of alfalfa had no correlation with the damage index. The damage index of Gannong No.3 applied with potassium were lower than that of Gannong No.9 without potassium application. 【Conclusion】 The potassium application enhances the resistance of alfalfa to thrips effectively by improving the carbon to nitrogen ratio and decreasing the free amino acid content. Therefore, the potassium application is an effective measure to enhance the tolerance of alfalfa to thrips in fields.

Key words: Medicago sativa, potassium fertilizer, thrips, insect resistance, nutrient

张晓燕, 师尚礼, 李小龙, 李亚娟, 胡桂馨. 不同施钾水平对苜蓿营养物质及抗蓟马性的影响 [J]. 昆虫学报, 2016, 59(8): 846-853.

ZHANG Xiao-Yan, SHI Shang-Li, LI Xiao-Long, LI Ya-Juan, HU Gui-Xin. Effects of applied potassium levels on alfalfa nutrients and resistance to thrips (Thysanoptera: Thripidae)[J]. Acta Entomologica Sinica, 2016, 59(8): 846-853.

0
/ / 推荐

导出引用管理器 EndNote|Reference Manager|ProCite|BibTeX|RefWorks

链接本文: http://www.insect.org.cn/CN/10.16380/j.kcxb.2016.08.006

http://www.insect.org.cn/CN/Y2016/V59/I8/846

[1]	李晓维, 罗雪君, 王丽坤, 章金明, 张治军, 黄俊, 吴建辉, 吕要斌. 普通大蓟马聚集信息素的分离和鉴定[J]. 昆虫学报, 2019, 62(9): 1017-1027.
[2]	徐松鹤, 李丽娜, 白雪, 郭美兰, 任琴. 施钾与蚜虫取食诱导的水杨酸对马铃薯抗虫性的影响[J]. 昆虫学报, 2019, 62(3): 343-350.
[3]	谢艳兰, 张宏瑞, 李正跃. 基于线粒体COI基因的中国西南地区木领针蓟马地理种群的遗传分化分析[J]. 昆虫学报, 2019, 62(3): 370-380.
[4]	芦小鹏, 吴琼, 李毛龙, 李三兴, 马志卿, 张兴. 126种植物精油或精油主要成分对玉米黄呆蓟马的熏杀活性筛选[J]. , 2018, 61(8): 941-949.
[5]	苟长青, 孙鹏, 刘端春, 迪丽努尔·艾麦提, 冯宏祖. 牧草盲蝽危害对寄主植物体内营养物质含量及保护酶活性的影响[J]. , 2018, 61(8): 976-983.
[6]	郭婷婷, 门兴元, 于毅, 郭文秀, 张思聪, 孙廷林, 李丽莉. 二点委夜蛾适应性与玉米苗营养物质和次生代谢物质含量的关系[J]. , 2018, 61(8): 984-990.
[7]	张晓晨, 冯纪年. 美棘蓟马体内Wolbachia感染的时空分布[J]. , 2018, 61(7): 843-850.
[8]	岳文波, 郅军锐, 刘利, 叶茂, 张向前, 曾广 . 害虫取食和机械损伤对菜豆不同部位叶片防御酶活性的影响[J]. , 2018, 61(7): 860-870.
[9]	韩冬银, 邢楚明, 李磊, 牛黎明, 陈俊谕, 张方平, 符悦冠. 芒果花果期蓟马寄主植物间迁移对其种群数量增长的影响[J]. , 2017, 60(6): 723-730.
[10]	王丽丽, 栾炳辉, 刘学卿, 王培松, 王英姿. 葡萄叶片中营养物质和叶绿素含量与其对绿盲蝽抗性的关系[J]. , 2017, 60(5): 570-575.
[11]	姜丽娜, 钱蕾, 喜超, 王雪丽, 杨璐, 桂富荣. CO₂浓度升高对不同寄主植物上西花蓟马和花蓟马成虫体内消化酶活性的影响[J]. 昆虫学报, 2017, 60(3): 237-246.
[12]	付步礼, 李强, 夏西亚, 唐良德, 邱海燕, 谢艺贤, 曾东强, 刘奎. 对乙基多杀菌素中度抗性降低黄胸蓟马的适合度[J]. 昆虫学报, 2017, 60(2): 180-188.
[13]	李晓维, 孙冉冉, 章金明, 张治军, 吕要斌. 西花蓟马成虫昼间交配习性和聚集信息素释放节律[J]. , 2017, 60(12): 1439-1446.
[14]	耿双双, 李晓维, 章金明, 张治军, 吕要斌. 西花蓟马和花蓟马聚集信息素田间引诱试验及其在种间互作中的作用[J]. , 2017, 60(12): 1447-1456.
[15]	张羽宇, 郅军锐, 刘勇, 叶茂. 西花蓟马取食对菜豆不同部位叶片防御基因表达的影响[J]. 昆虫学报, 2017, 60(1): 1-8.

不同施钾水平对苜蓿营养物质及抗蓟马性的影响

Effects of applied potassium levels on alfalfa nutrients and resistance to thrips (Thysanoptera: Thripidae)

PDF (PC)

赞

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

Metrics

本文评价

推荐阅读 10