小白菜硝酸盐含量及其主要影响因素研究  

Study onpakchoi's nitrate content and major influencing factors

作　　者：李建勇[1] 陆利民 张瑞明[1] 沈海斌[1] 李珍珍[1] 朱恩[1] 

机构地区：[1]上海市农业技术推广服务中心,上海201103 [2]上海市浦东新区农业技术推广服务中心,上海201201

出　　处：《上海农业学报》2013年第5期116-118,共3页Acta Agriculturae Shanghai

基　　金：上海市科技兴农推广项目[沪农科推(2009)第1-2号];中央财政专项"设施菜地土壤质量保育技术集成示范与推广"资助

摘　　要：调查了上海市浦东新区5家代表性园艺场的小白菜施肥及其硝酸盐情况,并进行了不同茬口和不同施肥量的小白菜生产试验,测定不同采收间隔期小白菜硝酸盐含量,以研究小白菜生产中的安全间隔期和最佳施肥量,以及影响小白菜硝酸盐含量的主要因素。调查及试验结果表明:各园艺场施肥量普遍较高,小白菜硝酸盐含量普遍超标(GB 18406.1-2001:≤3 000 mg/kg);氮用量75 kg/hm^2时,小白菜产量最高;安全间隔期、茬口安排以及施肥量是影响小白菜硝酸盐含量的主要因素。Both fertilizer rates in pakchoi production and nitrate contents of pakchoi were surveyed in 5 typical horticultural enterprises of Pudong New District, and also pakchoi production tests were carried out under different crop rotations and fertilizer rates and the nitrate contents of pakchoi at different harvest intervals were determined so as to investigate the preharvest period, the optimal fer- tilizer rate and the major factors influencing pakchoi^s nitrate content. The survey and the tests indi- cated that all the enterprises excessively applied fertilizer and the nitrate content of pakchoi generally exceeded the set standard（GB 18406.1-2001.43 000 mg/kg） ;When nitrogen fertilizer rate was 75 kg/hm2 the pakchoi yield was the highest; And the preharvest period,rotation crops and fertilizer rate were the major factors influencing the nitrate content of pakchoi.

关 键 词：小白菜 硝酸盐 施肥量 安全间隔期 

分 类 号：S606[农业科学—园艺学] S634.3