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当前位置: 首页 > 文章 > 缺铁失绿秋白梨树强力树干注射铁肥的效果初报 中国农业科学 1990,23 (5) 45-52+97-98
Position: Home > Articles > EFFECT OF PRESSURE TRUNK INJECTIONS WITH FeSO_4 ON CHLOROTIC PEAR(PYRUS BRETSCHNEIDERI REHD.)TREES Scientia Agricultura Sinica 1990,23 (5) 45-52+97-98

缺铁失绿秋白梨树强力树干注射铁肥的效果初报

作  者：
魏良稠;周厚基
单  位：
中国农业科学院研究生院
关键词：
缺铁失绿;强力树干注射;铁(Fe);叶片结构;秋白梨(Pyrus bretschneideri Rehd.)
摘  要：
果树缺铁失绿是果树生产上的一种重要营养失调症。本文报道了向缺铁失绿秋白梨树树干强力注射不同剂量硫酸亚铁矫治缺铁失绿的效果。注铁后10天开始复绿;至43天,不同注铁处理都有一定程度复绿,其中剂量≥6克/株的处理最好,失绿完全消共并且一直持续到秋季休眠落叶。不同注铁处理使叶片叶绿素和叶子铁(Fe)含量显著增加,并对叶片结构有明显的修复作用。通过与其它已有的缺铁矫治技术相比较,强力树干注射铁肥法是一个简便易引,高效、速效而且经济的新途径。
译  名：
EFFECT OF PRESSURE TRUNK INJECTIONS WITH FeSO_4 ON CHLOROTIC PEAR(PYRUS BRETSCHNEIDERI REHD.)TREES
作  者：
Wei Liangchou (The Graduate School, Chinese Academy of Agricultural Sciences, Beijing) Zhou Houji (Research Institute of Pomology, Chinese Academy of Agricultural Sciences, Xingcheng, Liaoning Province)
关键词：
Pressure trunk injection; Iron chlorosis; Fe; Leaf structure; Pear (Pyrus bretschneideri Rehd. )
摘  要：
This study was undertaken to evaluate the effect of pressure trunk injection of ferrous sulfate for correcting iron chlorosis of 6-year old pear ( Pyrus bretschneideri Rrhd.) trees in early June. Five rates of FeSO_4, namely, 0 (CK), 3, 6, 8-9 and 10-12 g/tree, were injected into the trees with 1% FeSO_4 solution through three holes drilled evenly around the trunk about 30-45 cm under the first limb.10 days after injection, the trees receiving FeSO_4 began to recover from chlorosis. They first turned red and then regreened. The chlorosis both on old leaves and new leaves disappeared completely on 43th day after injection, if≥6 g/tree of FeSO_4 was applied. The leaves remained green until the trees reached dormancy in fall. The contents of leaf ch1. (ch1. a, ch1. b and total ch1.) and leaf Fe increased significantly as a result of FeSO_4 injection.Injection of FeSO_4 had a repairing effect on the leaf structure of chlorotic pear trees. The palisade tissue and spongy tissue in chlorotic leaves were not arranged in order. There was less cytoplasm in mesophyll cells, with small, deformed chloroplasts and abnormal nuclear in the cells. The lamellar structure of chloroplasts was also disrupted and disorganized. But there existed more cytoplasm, larger and highly developed chloroplasts and normal nuclear in mesophyll cells of recovered leaves after FeSO_4 injection and the palisade tissue and spongy tissue in the leaves were normally organized. Among all the treatments, the 6 g FeSO_4 tree was the best one.Over dose injection of FeSO_4 may cause leaf phytotoxieity. It is necessary to decide an optimum dosage of FeSO_4 before extensive application in order to avoid any damage The optimum dosage was observed to be related with several factors. Compared.with ot other means to correct iron chlorosis, it can be concluded that pressure trunk injection of FeSO_4 is a quickly and highly effetive, easily operated and economical way to control the iron chlorosis in fruit trees.

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