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我场栽种在山地红壤的柑桔(蕉柑、甜橙、椪柑等),从1960年定植开始,生长浓绿壮旺,1963、1964年开始少量结果后,进行了深翻改土,埋下大量山草,1965年进入丰产期,产量从亩产1000斤到6600斤,高的达12000多斤。然自1971年起树势开始衰退,产量下降,起初整个柑区叶色退绿,接着呈现黄化,冬季落叶秃枝,1972年秋整片柑园表现一片衰退现象,根系检查则有严重的烂根。烂根程度从50—95％,整片柑园子1973年冬全部砍除。
My field planted in mountain red soil citrus (bananas, oranges, citrus, etc.), from the planting in 1960, the growth of thick green, 1963, a small amount of results began in 1964, the deep changes in the soil, planted A large number of mountain and grass, entered the high yield in 1965, yield per mu from 1,000 to 6,600 pounds, up to 12,000 kilos. Since 1971, however, the tree began to decline and the yield dropped. At first the leaf color of the entire citrus area turned green, followed by yellowing and bald branches in winter. In the fall of 1972, the whole piece of citrus orchard showed a decline, and the root inspection was severely rotten root. The degree of rotten roots from 50-95%, whole piece of citrus garden all cut off in the winter of 1973.