Effects of different potassium fertilization modes on yield, quality of lettuce and soil regime

doi:10.14088/j.cnki.issn0439-8114.2020.07.006

Abstract

Abstract: In order to obtain high quality organic potassium fertilizer suitable for lettuce production, a potted lettuce experiment was set to study the effect of different organic potassium fertilizer application on lettuce （Lactucas sativa L. var. ramosa Hort.） yield, quality and soil potassiums. The results showed that the application of potassium fertilizer could significantly increase the yield and quality of lettuce, and significantly improve the soil enzyme activities, microbe quality and nutrient status. Under the condition of equal application of potassium, 1∶1 application of chemical potassium fertilizer and biogas slurry can significantly improve the yield of lettuce. Its yield increased by 6.34%~30.53% compared with other potassium fertilizer treatments. The content of VC and soluble sugar of the treatment 1∶1 application ratio of chemical potassium fertilizer and biological bacteria fertilize postassium was the highest,followed by T₄. The combination of chemical potassium fertilizer and corn or rice straw potassium can significantly improve the soil conditions, the soil enzyme activity and microbial condition were significantly better than other treatments, the combination of chemical potassium fertilizer and biogas slurry were the second. Therefore, we can choose biogas slurry or straw as the source of organic potassium fertilizer in lettuce planting.

Key words: potassium fertilizer, lettuce（Lactucas sativa L. var. ramosa Hort.）, yield, quality, soil regime

CLC Number:

LI Chun-ping, WANG Su-ping, DU Lei, HONG Juan, HUANG Xiang, ZHANG Gui-you, ZHANG Li-hong, YE Li-xia, LIAN Zhi-cheng, JIANG Li, CHEN Gang. Effects of different potassium fertilization modes on yield, quality of lettuce and soil regime[J]. HUBEI AGRICULTURAL SCIENCES, 2020, 59(7): 28-32.

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