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首页> 外文期刊>Paddy and Water Environment >Effects of Si fertilization on Si in soil solution, Si uptake by rice, and resistance of rice to biotic stresses in Southern Vietnam
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Effects of Si fertilization on Si in soil solution, Si uptake by rice, and resistance of rice to biotic stresses in Southern Vietnam

机译：Si施肥对土壤溶液中Si的影响，越南南部稻米溶液，水稻对生物应力的影响

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摘要

Silicon (Si) mitigates abiotic and biotic stresses for rice plants (Oryza sativa L.). Here, we test relationships between Si cycling, plant growth, and pest and fungal attacks in rice agroecosystems. We conducted a plot experiment on Si fertilization in a Southern Vietnamese paddy, where plant-available Si was inherently low. For two cropping seasons, we investigated the temporal dynamics of Si in soil solution, plant Si uptake, and the occurrence of leaf folders (Cnaphalocrocis medinalis) and rice blast caused by the fungus Magnaporthe oryzae. Silicon application increased Si concentrations in soil solutions collected in the field as expected from previous laboratory experiments. Soil solution Si concentrations were furthermore affected by Si uptake by plants and by recycling Si with rice straw ash. Silicon concentrations in rice leaves at tillering stage increased with increasing Si application. However, surprisingly, no relationship between Si in soil solution and Si concentration in straw at maturity stage was found. The occurrences of leaf folders and rice blast disease were mitigated by increased Si uptake. However, rice biomass production was not affected, probably because the biotic stress level was generally low. Our field data emphasize the importance of recycling crop residues in rice fields for the Si supply to plants, especially in regions with low Si availability. They furthermore show that under field conditions, the relationship between dissolved Si in soil solution and Si uptake by rice plants is not as straightforward as expected and thus needs to be further investigated.
机译：硅（Si）减轻了稻米植物的非生物和生物应力（Oryza Sativa L.）。在此，我们在水稻农业体系中的Si循环，植物生长和害虫和害虫发作之间的关系。我们对南方越南稻田的SI施肥进行了剧情试验，其中植物可用的Si本身低。对于两种裁剪季节，我们调查了土壤溶液中Si的时间动态，植物Si吸收和叶片文件夹（CNaphalocrocis Medinalis）和稻瘟病造成的稻瘟病患者的发生。硅应用增加了以前的实验室实验预期的现场收集的土壤溶液中的Si浓度。通过植物的Si吸收和通过用稻草灰回收Si的Si吸收来影响土壤溶液的浓度。随着Si应用的增加，分蘖期稻壳中的硅浓度增加。然而，令人惊讶的是，发现，发现了成熟期的土壤溶液中的Si与Si浓度的关系。通过增加的Si吸收来减轻叶片文件夹和稻瘟病疾病的发生。然而，水稻生物质生产不受影响，可能是因为生物应力水平通常很低。我们的现场数据强调回收种植残留在稻田中的稻田对植物，特别是在具有低Si可用性的地区。他们进一步表明，在现场条件下，水稻溶液中溶解的Si与水稻植物的摄取之间的关系并不像预期的那样直截了当，因此需要进一步研究。

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