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探索一种杀螺施肥双效作用的新型杀螺剂。将博落回植物粉末分别与氮、磷、钾肥复合制成植物3种单肥复合杀螺剂(简称MPF),与3种肥料混合配成植物混合肥复合杀螺剂(简称MCF)。采用浸杀法进行杀螺试验,同时检验该复合杀螺剂对水稻萌发及生长的影响。结果显示,3种MPF(博落回植物分别与氮、磷、钾肥复合杀螺剂)处理钉螺,48h钉螺死亡率分别为100%、53.3%、66.7%;作用于水稻,能明显促进种子萌发和幼苗生长,如3种MPF使水稻种子萌发率分别为100%、80%和53%,分别比对照(40%)提高了60%、40%和13%;水稻幼苗分别增长了126.8%、70.7%和60.5%。MCF随处理浓度增加及处理时间延长,钉螺死亡率上升,较低浓度(200mg/L)处理48h和72h,钉螺死亡率分别为73.3%和86.7%;较高浓度(400mg/L)复合处理48h和72h,钉螺死亡率分别为83.3%、100%。然而,低浓度(200mg/L)MCF对水稻萌发和生长有促进作用,如水稻幼苗比对照增长了87.6%,但高浓度(400mg/L)则有一定抑制作用。因此,MPF对钉螺具有较好的杀螺活性,同时能促进水稻萌发和生长,其中植物氮肥复合杀螺剂效果最佳;MCF对钉螺均有杀螺活性,但低浓度对水稻有促进作用,而高浓度则有抑制作用。
To explore a new type of molluscicide to kill snail double effect. The Botanic and Botanic Plant Powder are respectively combined with nitrogen, phosphorus and potassium fertilizer to form three kinds of single-fertilizer compound molluscides (referred to as MPF), and mixed with three kinds of fertilizers to compose a compound fertilizer for plant killing (MCF). The snail test was conducted by immersion method, and the effect of the compound snail on the germination and growth of rice was also tested. The results showed that the mortality rates of Oncomelania snails from three kinds of MPFs treated with N, P, K compound molluscicides were 100%, 53.3% and 66.7%, respectively. The effect on the germination of seeds And seedling growth. For example, three kinds of MPF increased the germination rate of rice seeds by 100%, 80% and 53%, respectively, by 60%, 40% and 13% respectively compared with the control (40%); rice seedlings increased by 126.8% 70.7% and 60.5%. The mortality of Oncomelania snails increased with the increase of treatment concentration and treatment time, and the mortality of Oncomelania snails was 73.3% and 86.7% at the lower concentration of 200mg / L for 48h and 72h, respectively. The higher concentration of 400mg / L combined treatment for 48h And 72h, the mortality rates of snails were 83.3% and 100% respectively. However, the low concentration (200mg / L) of MCF could promote the germination and growth of rice. For example, the seedling of rice increased 87.6% compared with the control, but the high concentration of 400mg / L inhibited the growth of rice seedlings. Therefore, MPF had better activity of killing snails on snails, and promoted the germination and growth of rice at the same time. Among them, the compound nitrogenous fertilizer of plant was the best and the activity of snail was the best. However, The high concentration is inhibited.