Effects of different potassium fertilizer on yield,quality,photosynthesis and economic benefit of potato

doi:10.14088/j.cnki.issn0439-8114.2021.24.014

Abstract

Abstract: Pot and field experiments were carried out to study the effects of potassium chloride and potassium sulfate on yield, quality and photosynthesis of potato. The potato varieties Xisen 6 and Favorita were used as experimental materials in the pot experiments. And used potassium chloride 1 117 mg/L（equivalent to K₂O 700 mg/L）, potassium sulfate 1 297 mg/L（equivalent to K₂O 700 mg/L） two treatments. Field experiment Favorita was used as the experimental material, and potassium chloride （containing K₂O 62.5%） was used for 480 kg/hm² （containing K₂O 300 kg）, potassium sulfate （containing K₂O 54%） 555 kg/hm² （containing K₂O 300 kg）, potassium chloride 240 kg/hm² （containing K₂O 10 kg）+potassium sulfate 278 kg/hm² （containing K₂O 150 kg） were used in the three treatments. The comparison was farmers’ routine fertilization, NPK ternary compound fertilizer （N 15%, P₂O₅ 15%, K₂O 15%）, 1 500 kg/hm², and organic fertilizer 750 kg/hm². The results showed that the application of chlorinated potash fertilizer could improve the tuber yield, dry matter and starch contentin in pot experiment. When potassium chloride fertilizer was applied in Dawu experimental site, the revenue increased by 7 062 yuan/hm², decreased by 2 748 yuan/hm² when potassium sulfate was applied, and increased by 4 335 yuan/hm² when potassium sulfate was combined with potassium chloride. Compared with the control, potassium chloride increased the yield by 3 663 yuan/hm², potassium sulfate decreased by 2 121 yuan/hm², potassium chloride and potassium sulfate increased the yield by 2 289 yuan /hm² in Dongguo experimental site.

Key words: potato（Solanum tuberosum L.）, potassium sulfate, potassium chloride, yield, quality, photosynthetic

CLC Number:

X53
X503.231

CHEN Guang-xia, KONG Jin-hua, KONG Hai-ming, YANG Yu, LIU Fang, YANG Yuan-jun, GUO Xiao, YANG Xiao-hui, DONG Dao-feng. Effects of different potassium fertilizer on yield,quality,photosynthesis and economic benefit of potato[J]. HUBEI AGRICULTURAL SCIENCES, 2021, 60(24): 59-62.

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