摘要
根系输液条件下 ,N Fe能够在短时间内有效地矫正苹果缺铁失绿症 ,EDTA Fe容易产生肥害 ,柠檬酸铁效果居中。红色邻二氮杂菲铁示踪结果表明 :二价铁肥根系输液处理时仍以二价态由根被动吸收 ,运输到根、茎、叶和主脉内 ,运输部位都是靠近形成层的木质部 ,运输速度每小时可达数十厘米。室内营养液培养的八棱海棠苗用 5 9Fe示踪结果表明 ,断根中分配的 5 9Fe为 1 9.3% ,叶中分配的 5 9Fe占 70 .9% ,八棱海棠5 9Fe示踪结果表明 ,断 1、 2、 3条根 5 9Fe在叶中分配的比例分别为 57.9%、 63.6%和 68.0 %
ExperimentsofusingCitricacidFe,EDTAFeandNFeforcorrectingapple(cv:starking delicious)chlorosis by rootinserted was conducted.The best result was obtained with treatment of 5 99×10 -3 mol/L NFe.EDTAFe was the most sensitive one to apple leaves.The effect of Citric acidFe was in the middle.The trace of red OphenanthrolineFe indicated:Fe 2+ was absorbed by roots and transported to stem,leaves and main vein when iron feritilizer was rootinserted.Fe 2+ was transported along xylem near cambium.The speed of transportation reached dozens centimetre per hour.Trace of 59 Fe with Malus micromalus Makino cultured in nutrient solution under controlled conditions indicated:distribution of 59 Fe in cutting roots and leaves was 19 3% and 70 9%,respectively.Trace of 59 Fe with Malus micromalus indicated:ratio of iron distributed in leaves by cutting one,two,three roots were 57 9%,63 6% and 68 0%,respectively.
出处
《广西农业生物科学》
CSCD
2000年第4期217-222,共6页
Journal of Guangxi Agricultural and Biological Science
基金
国家自然科学基金资助课题(39970527)
关键词
铁肥
根系输液
苹果
缺铁失绿症
iron fertilizer
rootinserted
apple tree
iron deficiency chlorosis
