小白菜肥料运筹技术  

Fertilizer Application Techniques of Packchoi

作　　者：严瑾[1] 严杰 朱梅芳 邱韩英 丁爱华[1] 

机构地区：[1]上海市农业技术推广服务中心,上海201103 [2]上海月浦镇农业综合服务中心,上海200942 [3]上海宝山区农业技术推广中心,上海200941

出　　处：《上海交通大学学报（农业科学版）》2012年第4期39-42,51,共5页Journal of Shanghai Jiaotong University(Agricultural Science)

基　　金：上海市农委项目(上海市蔬菜产业技术体系建设)

摘　　要：在上海市宝山区月浦镇的露地菜田设置以直播小白菜为代表的叶菜田间施肥试验,对施氮量、施磷量、施钾量、基肥施用量、氮追肥运筹、叶菜相对产量等一系列试验数据进行相关统计分析,求取相应的数学模型,初步建立露地直播小白菜的推荐施肥量指标。结果表明:(1)建立露地直播小白菜推荐氮肥效应函数为y=-0.270 3x2+104.19x+1 588.4,相关系数R2=0.909 1。磷肥效应函数为y=-3.386 7x2+420.89x-744.05,相关系数R2=0.873 0。钾肥效应函数为y=-1.729 5x2+205.51x+5 859.6,相关系数R2=0.874 3。(2)推荐每公顷小白菜基肥施用NPK复混肥应不少于300kg/hm2,当小白菜长出3～4片真叶后,应及时追施氮肥,7～10d之后再追施1次,共折合尿素320kg/hm2。2次氮追肥配比为2∶1时较有利于生物产量的形成。整个生产过程总施纯N 195kg/hm2,P2O560～75kg/hm2,K2O 60kg/hm2。The leaf fertilizer trial with packchoi was conducted in open vegetable field in Yuepu town,Baoshang district,Shanghai city.A series of test data include the amount of nitrogen fertilizer,phosphorus fertilizer,potassium fertilizer,base fertilizer,nitrogen top-dressing and leaf relative yield were analyzed,the corresponding mathematical model was established,and the proper fertilization quantity of outdoor sowing packchoi was determined.The results showed that the function of nitrogen fertilizer,phosphorus fertilizer and potassium fertilizer were y=-0.270 3x2＋104.19x＋1 588.4（R2=0.9091）,y=-3.386 7x2＋420.89x-744.05（R2=0.8730）,y=-1.729 5x2＋205.51x＋5 859.6（R2=0.874 3）,respectively.The amount of NPK compound fertilizer as base manure was not less than 300 kg/hm2.Nitrogen fertilizer as dressing manure was proposed to be used after packchoi has 3～4 leaves.7～10 days later,nitrogen fertilizer was used again.The total nitrogen as dressing manure was 320 kg/hm2.The ratio of 2∶1 twice dressing manure benefited biological yield.Totally,195 kg/hm2 N,60～75 kg/hm2 P2O5,60 kg/hm2 K2O fertilizer were used in the process.

关 键 词：绿叶菜 小白菜 施肥 氮素 

分 类 号：S634.3[农业科学—蔬菜学]