Vermicompost is an excellent organic fertilizer, but the application of vermicompost in fragrant rice production has not yet been reported. Seedling nursery is an important component of rice production. The present study firstly applied vermicompost in fragrant rice production through nursery raising. The seedlings of three fragrant rice cultivars were raised in matrix with different rations of vermicompost (the treatment without vermicompost was taken as the control), and the growth parameters and physiological characters of seedlings were investigated. The results showed that, compared with the control, the application of vermicompost significantly (p < 0.05) increased the plant height, stem diameter, fresh weight, and dry weight of fragrant rice seedlings by 11.22–24.73%, 38.34–65.87%, 16.74–30.46%, and 16.61–35.16%, respectively. Nursery raising with vermicompost significantly (p < 0.05) enhanced the net photosynthetic rate by 5.99–12.93%, relative to the control. Higher contents of chlorophyll a, chlorophyll b, carotenoids, and total chlorophyll were recorded in vermicompost treatments than in the control. Compared with the control, vermicompost treatments also increased root length, surface area, mean diameter, root volume, root tip number, and root activity of fragrant rice seedlings by 12.42–27.82%, 15.04–38.65%, 12.64–23.12%, 42.41–63.58%, 18.62–24.95%, and 12.01–26.29%, respectively. Moreover, nursery raising with vermicompost enhanced the activities of antioxidant enzymes including superoxide, peroxidase, and catalase by 7.97–24.21%, 17.11–44.99%, and 7.37–15.95%, respectively, relative to the control. Moreover, 7.92–29.40% lower malondialdehyde contents were recorded in vermicompost treatments compared with the control. Therefore, nursery raising with vermicompost could be a good agronomy practice in machine-transplanted fragrant rice.

中文翻译：

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蚯蚓粪在水稻生产中的初步应用：蚯蚓粪苗对香米性能的影响

蚯蚓粪是一种优良的有机肥料，但蚯蚓粪在香米生产中的应用尚未见报道。育苗是水稻生产的重要组成部分。本研究首次将蚯蚓粪应用于育苗香米生产中。将3个香稻品种的幼苗在基质中施以不同比例的蚯蚓粪（以不施蚯蚓粪的处理为对照），考察了幼苗的生长参数和生理特性。结果表明，与对照相比，蚯蚓粪施用量显着（p< 0.05) 使香稻幼苗的株高、茎粗、鲜重和干重分别增加 11.22-24.73%、38.34-65.87%、16.74-30.46% 和 16.61-35.16%。用蚯蚓粪显着提高苗圃（p< 0.05) 与对照相比，净光合速率提高了 5.99-12.93%。蚯蚓粪处理记录的叶绿素a、叶绿素b、类胡萝卜素和总叶绿素含量高于对照。与对照相比，蚯蚓粪处理还使香稻幼苗的根长、表面积、平均直径、根体积、根尖数和根活性增加了12.42-27.82%、15.04-38.65%、12.64-23.12%、42.41-分别为 63.58%、18.62-24.95% 和 12.01-26.29%。此外，与对照相比，蚯蚓堆肥育苗使超氧化物、过氧化物酶和过氧化氢酶等抗氧化酶的活性分别提高了 7.97-24.21%、17.11-44.99% 和 7.37-15.95%。此外，7.92-29。与对照相比，蚯蚓堆肥处理记录的丙二醛含量降低了 40%。因此，蚯蚓堆肥育苗是机插香稻的良好农艺实践。