论文部分内容阅读
以浅色系厚皮甜瓜品种‘九红瑞’为试材,将有机氯杀菌剂(腐霉利,FML)和杀虫剂(高效氯氟氰菊酯,LJZ)分别配制成1 000倍和2 000倍药液,对开花后第15天的甜瓜果实进行单独喷施处理,在果实污染危害症状显现时,利用叶绿素荧光动力学技术对其污染效应进行分析和评价。结果表明:与对照相比(清水加助剂,CK),甜瓜果实在喷施有机氯农药后的第7天便开始产生明显的污染危害症状,且表现出多位点毒害特征,即不仅破坏原初光化学结构,还降低碳吸收动力学活性,更为重要的是增加光能过量耗散,引起光系统II(PSII)乃至整个光合机构的光抑制甚至光损伤,间接导致甜瓜果实表面组织的热灼伤斑点发生。通过模糊数学的隶属函数法对甜瓜果实受有机氯农药污染的程度进行综合评价,结果发现LJZ污染程度明显高于FML的,且随着喷施浓度的增大而增强。
The light-colored muskmelon cultivar “Jiuhongrui” was used as test material, and the organochlorine bactericide (FML) and insecticide (lambda-cyhalothrin, LJZ) 000 times the liquid, on the 15th day after flowering melon fruit spray alone treatment, the risk of pollution in the fruit appears, the use of chlorophyll fluorescence kinetic techniques to analyze and evaluate its pollution effects. The results showed that on the 7th day after the application of organochlorine pesticides, the melon fruits began to produce obvious pollution hazard symptoms and showed multi-locus poisoning characteristics, ie not only the damage The original photochemical structure, but also reduce the carbon absorption kinetics activity, more importantly, to increase the excessive dissipation of light energy, causing photosystem II (PSII) and even the entire photosynthetic mechanism of light inhibition or even light damage, indirectly lead to the melon fruit surface tissue heat Burns spots occur. The membership function of fuzzy mathematics was used to evaluate the degree of organochlorine pesticide contamination in melon fruits. The results showed that the contamination level of LJZ was significantly higher than that of FML, and increased with the increase of spraying concentration.