为了研究枣树根系年生长周期内矿质元素含量变化的情况，提高枣园的栽培管理技术，为科学合理的施肥提供一定的科学依据。本试验对‘大白铃枣’、‘大瓜枣’、‘梨枣’、‘苹果枣’、‘晋矮3号’果实生长发育时期根系氮、磷、钾、钙、镁含量的变化规律进行研究。结果表明：植株生长初期，根系开始活动，活力不高，植株主要依靠体内贮藏营养物质来提供生长发育所需矿质元素，各枣品种大多数矿质元素的含量有不同程度的减少；植株生长中期通过根系从土壤中吸收大量矿质元素供新器官发育，根系中矿质元素变化较为复杂；在植株生长后期，大多数矿质元素均出现不同程度的增加并趋于稳定，开始为冬季休眠进行营养物质的贮藏。
Abstract
To study mineral elements content in Chinese jujube roots during the growth cycle to improve jujube cultivation management technology and provide a scientific basis for fertilization, the change way of the content of nitrogen, phosphorus, potassium, calcium and magnesium in the root of‘Dabailingzao’,‘Daguazao’, ‘Lizao’,‘Pingguozao’,‘Jin’ai No.3’was studied. The results showed that the root system activity of all jujube varieties began in the early growth period, but was not energetic, the nutrients were mainly from tree storage, and the content of most mineral elements reduced at different levels. The change of mineral elements of root became complex in the medium growth period, the plant absorbed lots of mineral elements from soil for the growth of new organs. Most of the mineral elements increased at different levels with a trend towards stable in the later growth period on account of the nutrient storage for winter dormancy.
关键词
鲜枣;根部矿质元素;动态变化
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Key words
fresh jujubes; roots; mineral elements; dynamic changes
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