摘要
调查发现,山楂黄叶有两种类型,一种是局部黄叶,另一种是整株黄叶。患局部黄化的山楂是由于缺铁所致,喷施200倍黄腐酸二胺铁或0.3％尿素+0.3％硫酸亚铁防治黄化的效果好于其它处理。整株黄化的山楂树可能是其它原因造成的,所有处理的效果不太理想。山楂叶的叶绿素相对量与净光合强度呈显著线性相关,随叶绿素含量的增加,净光合强度也增加,回归方程是y=1.06x+4.282。
Two kinds of hawthorn leave chlorosis, some and all of leaves, were found in field. The former can be cured when spraying 200x Fe-diamine fulvie acid or 0.3％urea+0.3％eSO_4 which effects were better than other treatment and thus showed iron deficiency. The later couldn't be cured by all treatments used in the experiment and showed other pathogenicity not the same as that of former. There was a significant positive ccrrelation (r=0.935) between the relative amount of chlorophyl and net photosynthesis in hawthorn with a regression formula y=1.06x+4.282.
关键词
山楂
黄化
铁肥
净光合强度
hawthorn chlorosis ferric fertilizer net photosynthesis
