基于SPAD仪的精准施肥模式对烤烟叶片生长发育及产量性状的影响

Effects of SPAD value-based field nitrogen management on leaf development and yield of flue-cured tobacco

以华烟06为试验材料,设置基于SPAD仪的烤烟实时氮肥追施的精量施肥方式(SPAD阈值为43)和农户惯用施肥方式两个处理,探讨两种施氮方式对烟株不同部位叶片的植物学特性及产量性状的影响。结果表明:基于SPAD仪的烤烟实时氮肥追施的精量施肥方式显著增加了各部位叶片的叶面积和比叶重,烤后上中等烟比例、均价和产值显著增高,分别为93.46%、16.34元/kg和42 773.2元/hm2,烤烟的氮肥农学利用率和氮肥吸收利用率显著高于农户惯用施肥模式,分别增加了53.03%和40.3%。

The paper set two fertilization ways on Huayan06, one was the real-time nitrogen fertilization way of flue-cured tobacco based on SPAD meter （SPAD value：43）, the other was farmer habitual nitrogen fertilization way. By means of menstruating agricultural characters, and economic characters of the different parts leaf, explored the effect of two nitrogen application ways on typical locations of tobacco leaf quality style. The results showed that the leaf area and specific leaf mass of different flue-cured tobacco positions leaf were higher under the real-time nitrogen fertilization way of flue-cured tobacco based on SPAD meter, the proportions of best and middle classes, average prices and output value were higher, the value were 93.46%, 16.34 yuardkg and 42 773.2 yuardhm2 respectively, N agronomy efficiency and N recovery efficiency were significantly higher than farmer habitual nitrogen fertilization way, increased by 53.03% and 40.3%.