果樹(shù)隨著年齡的增長(zhǎng),樹(shù)皮變粗,老而粗的樹(shù)皮不適應(yīng)樹(shù)干木質(zhì)部的加粗生長(zhǎng)而擠壓導(dǎo)管,輸養(yǎng)受阻,削弱長(zhǎng)勢(shì),導(dǎo)致樹(shù)體早衷。刮去皮有利于果樹(shù)皮更新生長(zhǎng),又可消滅潛伏在粗皮縫中的越冬害蟲(chóng)(卵、蛹和病菌孢子),減輕來(lái)年的病蟲(chóng)害,從 (共 545 字) [閱讀本文] >>
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 果樹(shù)隨著年齡的增長(zhǎng),樹(shù)皮變粗,老而粗的樹(shù)皮不適應(yīng)樹(shù)干木質(zhì)部的加粗生長(zhǎng)而擠壓導(dǎo)管,輸養(yǎng)受阻,削弱長(zhǎng)勢(shì),導(dǎo)致樹(shù)體早衷。刮去皮有利于果樹(shù)皮更新生長(zhǎng),又可消滅潛伏在粗皮縫中的越冬害蟲(chóng)(卵、蛹和病菌孢子),減輕來(lái)年的病蟲(chóng)害,從 (共 545 字) [閱讀本文] >>