摘要
通过对甘肃省秦安县苹果叶缘焦枯死亡的原因初步调查。结果表明；苹果叶缘焦枯是由于土壤中单盐（NaCl）毒害所致，而土壤中盐分的来源是通过微咸水和中度咸水灌溉累积造成的，随年限的增加，危害日趋严重。从土壤的分析结果看，项目区果园土壤盐分组成类型为：0～20cm和40-60cm土层为氯化物-苏打-硫酸盐型；20-40cm土层为苏打-氯化物～硫酸盐型。pH〈8．5，土壤表层盐分的含量均小于0．20％，ESP值小于10，HCO3-／（Cl^-＋SO4^2-）〈0．5，与生长良好的果园区土壤相比有轻微的盐化和碱化现象。
This study investigated the effects of different factors on the death reason of apple leaf marginal withered. The results showed apple leaf marginal withered was caused by single sah poison in soil. And that the origin of soil salt was irrigated by tiny salt water or middle degree salt water again and again. Along with irrigated number of year increasing, single salt poison tend towards more severity. From soil analysis we could seen that orchard soil salt composing types of the experiment area was Chloride-soda-Sulfate in the 0;20 and 40;60 cm soil layer depth, the 20-40 cm soil layer was Soda- Chloride-Sulfate. Soil pH was less 8. 5,and all soil surface layer salt contents less 0. 20 ;, F;SP was less 10, HCO3^-/（Cl^ ＋ SO4^2- ） was less 0.5. There were a little salt and basification phenomena with soil of growth better orchards compare.
出处
《北方园艺》
CAS
北大核心
2008年第8期27-29,共3页
Northern Horticulture
基金
甘肃省科技厅资助项目(QS031-C31-23)
关键词
苹果
叶缘焦枯
死亡原因
秦安县
Apple
Leaf marginal withered
Death reason
Qinan county
作者简介
郭全恩（1974-），男，甘肃天水人，在读博士，助研，主要从事果树生理病害和土壤物理改良以及盐碱地治理等方面的研究。E-rmail：qnguo@sina．com。
通讯作者：郭天文。E-mail：guotwll@sohu．com。
