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以广州的赤红壤为供试土壤进行水稻盆栽试验。结果表明,黄坭瘟是水稻特有的“亚铁中毒”病症,主要是土壤有效磷缺乏所致。凡土壤有效磷含量<5.78ppm,土壤活性铁>1500ppm,植株铁>500ppm,可作为诊断临界值。电镜检查可见,黄坭瘟稻叶片导管内有大量黑色铁质沉滤,细胞壁被溶解,胞间联丝破坏,叶绿体片层粘化并断裂,亲锇粒子有被溶解现象。重施磷肥和有机肥,多耕多耙加速土壤熟化,选用抗逆性强的稻种等措施,可防治水稻黄坭瘟。
The red soil in Guangzhou for the test soil for pot experiments. The results showed that the yellow fever plague is a rice-specific “ferrous poisoning” disease, mainly due to lack of available phosphorus soil. Where the available phosphorus content of soil <5.78ppm, soil active iron> 1500ppm, plant iron> 500ppm, can be used as a diagnostic threshold. Electron microscopy showed that a large number of ferrous iron filters were deposited in the leaves of P. crispus leaves, the cell wall was dissolved, the interstitial filaments were destroyed, the chloroplast lamella was sticky and ruptured, and the affinity osmium particles were dissolved. Re-application of phosphate and organic manure, more tillage and more rake to accelerate soil maturity, the selection of strong resistance rice varieties and other measures to prevent and cure of rice Huang Wan blast.