叶面肥对苗期油菜生长特性的影响  

Effect of foliar fertilizer on growth of rapeseed seedlings

作　　者：李瑞海[1] 徐大兵[1] 黄启为[1] 徐阳春[1] 杨兴明[1] 沈其荣[1] 

机构地区：[1]南京农业大学资源与环境科学学院,江苏南京210095

出　　处：《南京农业大学学报》2008年第3期91-96,共6页Journal of Nanjing Agricultural University

基　　金：农业部948项目(2006-G62)

摘　　要：通过盆栽试验,研究了叶面肥对苗期油菜生长特性的影响。结果表明,与处理1(清水对照)比较,处理4(营养物质+复硝酚钠(4 mg.L-1)和DA-6(4 mg.L-1)+表面活性剂(S-240,1μL.L-1))的苗期油菜植株具有最大的生物量(每株0.38 g)、叶片长宽增加值(0.69 cm×0.60 cm)和株高净增量(3.40 cm),其他依次为处理2(营养物质+表面活性剂(S-240,1μL.L-1))、处理3(营养物质+复硝酚钠(4 mg.L-1)和DA-6(4 mg.L-1))、处理5(营养物质+复硝酚钠(10 mg.L-1)和DA-6(4 mg.L-1)+表面活性剂(S-240,1μL.L-1))。与对照相比,各叶面肥处理叶片的叶绿素含量(SPAD值)及光合速率均有升高趋势,处理4增幅最大,分别增加27.8%和23.0%。各叶面肥处理油菜N、K累积量也以处理4最高,分别比对照增加31.1%、31.3%。苗期油菜喷施合适的叶面肥,能够促进其营养生长,增加其生物量。叶面肥中复硝酚钠和DA-6浓度过高反而会抑制苗期油菜生长。本试验条件下处理4是油菜苗期比较好的叶面肥配方。A pot experiment was carried out to study the effect of foliar fertilization on the growth of rapeseed seedlings. The results obtained were listed as follows. Compared with control （water only） , treatment 4 （nutrientsubstance ＋ compound sodium nitro- phenolate （4 mg · L^-1 ） and DA-6 （4 mg · L^-1 ） ＋ surfactant （ S-240, 1 μL · L^-1 ） had a maximum biomass （0. 38 g · plant^-1 ） and increments of leaves length and width （0. 69 cm×0. 60 cm） and height （3.40 cm） of rapeseed seedlings, higher than those of treatment 2 （ nutrientsubstance ＋ surfactant （ S-240, 1μL · L^-1 ） ）, treatment 3 （ nutrientsubstance ＋ compound sodium nitrophenolate （4 mg · L^-1 ） and DA-6 （4 mg · L^-1 ） and treatment 5 （ nutrientsubstance ＋ compound sodium nitrophenolate （10 mg· L^-1） andDA-6 （4 mg · L^-1） ＋surfactant （S-240, 1μL · L^-1）. SPAD reading and photosynthetic rate of rapeseed seedlings in all treatments increased and higher increments were observed in treatment 4 by 27.8% and 23.0% respectively than the control. Moreover, N and K accumulations of the rapeseed seedlings were also maximized in treatment 4 and the increments were 31.1% and 31.3% respectively compared with the control. To conclude, foliar fertilization on rapeseed seedlings could increase its biomass and stimulate its growth. Excessive concentration of compound sodium nitrophenolate and DA-6 in foliar fertilizers would depress its growth. Treatment 4 presented the best proportion for the growth of rapeseed seedlings.

关 键 词：叶面肥 油菜 生物量 生长 苗期 

分 类 号：S565.4[农业科学—作物学]