施氮量對(duì)慈姑淀粉積累及淀粉合成酶活性的影響

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中圖分類號(hào)：S645.9 獻(xiàn)標(biāo)志碼：A 章編號(hào)：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

慈姑是澤瀉科慈姑屬直立水生草本植物，又稱慈菇、茨菇等，原產(chǎn)中國(guó)，食用部分為地下球莖，供應(yīng)冬季蔬菜市場(chǎng)。（剩余8519字）