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落叶松单宁微肥，稀释５００倍后，对红富士苹果叶面每年于盛花期、果实膨大期和着色期各喷施１次，可使座果率提高１３．０％～１７．８％，产量增加１９．８％～２５．４％。
After 500 times of dilution, the foliar application of larch tannin was sprayed on the foliage of red Fuji apple at full flowering stage, fruit enlargement stage and pigmentation stage respectively, which increased the fruit setting rate by 13.0% -17.8% , Output increased 19.8% ~ 25.4%.