施氮量对慈姑淀粉积累及淀粉合成酶活性的影响

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中图分类号：S645.9 献标志码：A 章编号：1673-2871（2025）06-152-06

Effects of nitrogen application rate on starch accumulation and starch synthetase activity inSagittariasagittifolia

LIN Zhicheng'， JIANG Wen'， GAO Meiping'， TAO Yunrong²， YANG Qunfang²， LIANG Lingling² （1.Vegetablechsiuteidemulieniin;glet culturalcienceesearchIstitute，ingle44o，uangxi，ina）

Abstract： Inorder to studythe efects of different nitrogen applicationrateson starch accumulationand the activityof keyenzymesofstarch synthesisduring thedevelopmentofSagitariasagitifolia，fourdifferentnitrogenapplicatiorates were setup with the main variety of S sagittifolia GuiciNo.1 in Guangxi as experimental material.With the increase of nitrogenapplicationrate，thecontentof amylose，amylopectinand total starchincorms increasedatfirstand thendecreased，andN2 treatment （ 240kg⋅hm-2 had the best effect.The peak time of enzyme activity and starch accumulation rate was not affct bydifferent nitrogen applicationrates，which occurred inthe middle stageofcorm expansion（90 days after planting），and the amylopectinand total starch accumulationrateof N2 treatment had the maximum afterplanting 75and90days.Furthercorrelationanalysisshowedthatthestarchaccumulationratewassignificantlypositivelycorrelated with GBSS，SSS，AGP，and SBEactivity.In general，the starch contentof Guici No.1 isthehighest underN2 treatment（ 240kg⋅hm⋅2） ，and the reasonable application of nitrogen fertilizer is conducive to the accumulation of starch in S sagittifolia and improvement of quality.

KeyWords：Sagittaria sagitifolia;Nitrogen applicationrate; Starch accumulation; Starch synthase

慈姑是泽泻科慈姑属直立水生草本植物，又称慈菇、茨菇等，原产中国，食用部分为地下球茎，供应冬季蔬菜市场。（剩余8519字）