Seebold K W, Datnoff L E, Correa-Victoria F J, Kucharek T A, Snyder G H
Former Graduate Research Assistant.
Professor of Plant Pathology, University of Florida-IFAS, Everglades Research & Education Center (EREC), Belle Glade 33430.
Plant Dis. 2000 Aug;84(8):871-876. doi: 10.1094/PDIS.2000.84.8.871.
Blast-resistant, partially resistant, and susceptible cultivars of rice were planted in soil amended with Si at 0, 500, or 1,000 kg/ha at two locations in eastern Colombia to assess differential responses to leaf blast, neck blast, and leaf scald, and to examine the quantity and quality of grains harvested. Leaf and neck blast on partially resistant and susceptible cultivars were reduced by Si as the rate of Si was increased. Depending on the location, the level of severity of leaf and neck blast on partially resistant cultivars, when fertilized with Si at 500 or 1,000 kg/ha, was lowered to that of resistant cultivars without Si. At both locations, yields were increased by as much as 42%, depending on the cultivar, by Si applied at 1,000 kg/ha. In general, high rates of Si reduced the number of broken grains harvested. Grain discoloration, regardless of cultivar or location, was reduced by as much as 70% at the high rate of Si. The application of Si to complement host resistance to blast and scald appears to be an effective strategy for disease management in rice and provides the added benefit of improving the quantity and quality of rice yields.
在哥伦比亚东部的两个地点，将抗稻瘟病、部分抗病和感病的水稻品种种植在分别添加了0、500或1000千克/公顷硅的土壤中，以评估对叶瘟、穗颈瘟和叶瘟病的不同反应，并检验收获谷物的数量和质量。随着硅施用量的增加，部分抗病和感病品种上的叶瘟和穗颈瘟病情减轻。根据地点不同，当部分抗病品种施用500或1000千克/公顷硅时，叶瘟和穗颈瘟的严重程度降低到未施硅的抗病品种的水平。在两个地点，施用1000千克/公顷硅时，产量根据品种不同最高可提高42%。总体而言，高施硅量减少了收获时破碎谷粒的数量。无论品种或地点如何，高施硅量下谷粒变色程度最多降低70%。施用硅以补充宿主对稻瘟病和叶瘟病的抗性，似乎是水稻病害管理的一种有效策略，并且还能提高水稻产量的数量和质量。
