SONG Sansan,ZHENG Qiangqing,ZHI Jinhu,et al.Dynamics of Phosphorus Content of Jujube Plants by Different Potassium Application Amount[J].Northern Horticulture,2021,(19):54-60.[doi:10.11937/bfyy.20210012]
不同钾肥用量下南疆红枣植株体内磷素动态变化
- Title:
- Dynamics of Phosphorus Content of Jujube Plants by Different Potassium Application Amount
- Keywords:
- jujube; potassium fertilizer; phosphorus; organs; distribution
- 文献标志码:
- A
- 摘要:
- 以四年生直播密植骏枣为试材，通过控制钾肥不同施用量，研究分析其对枣园植株各器官有效磷含量及分配量的变化,以期为南疆红枣钾肥施用提供参考依据。结果表明：各生育时期中，随着钾肥施用量的增加，植株各器官磷素含量变化趋势有所不同。其中，花期、坐果期各器官全磷含量较其它时期明显偏高；在展叶前期，不同钾肥施用量与枣头枝全磷含量呈极显著正相关（r=0.982 7**），此时，磷素主要供给对象为根部，在花期、坐果期和成熟期，大量的磷素输送至枣吊和叶片。综上所述，钾肥施用量在225~450 kg?hm-2时，枣树各器官对磷素的吸收无较大影响，但钾肥施用过量（≥675 kg?hm-2）时，则会抑制植株各器官对磷素的吸收。
- Abstract:
- Taking four-year-old direct seeding and dense planting jujube as the experimental material,the changes of available phosphorus content and distribution in different organs of jujube were studied by applying different rates of potassium fertilizer，in order to provide basis of potassium fertilizer application rate of jujube in southern Xinjiang.The results showed that the change trend of phosphorus content in various organs of the plant was different with the increasing of potassium application rate in each growth period.Among them,the total phosphorus content of each organ in flowering and fruit setting stage was significantly higher than that in other stages;in the early stage of leaf development,there was a very significant positive correlation between different potassium application rates and the total phosphorus content of jujube head branch (r=0.982 7**),and at this time,the main supply object of phosphorus was the root,while a large amount of phosphorus was transported to jujube hanging and leaves in flowering,fruit setting and mature stages.In conclusion,there was no significant effect on phosphorus absorption in different organs of jujube when the potassium application rate was 225-450 kg?hm-2,but excessive potassium application (675 kg?hm-2) could inhibit phosphorus absorption in different organs of jujube.
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备注/Memo
第一作者简介：宋伞伞(1995-)，女，硕士研究生，研究方向为施肥与农业环境。E-mail：Sss_tarim@163.com.责任作者：支金虎(1978-)，男，博士，教授，现主要从事施肥与农业环境等研究工作。E-mail：zjhzky@163.com.基金项目：新疆生产建设兵团重大科技资助项目（2019AA004）；塔里木大学研究生科研创新资助项目（TDGRI201913）。收稿日期：2021-01-02