Effects of potassium fertiliser on potassium content in flue-cured tobacco leaves and the economic benefits in Gansu province

Abstract

Abstract: Low potassium (K) content in flue-cured tobacco leaves and the low economic benefits of flue-cured tobacco have been a big problem in tobacco production because of inadequate fertilization in Gansu province. The effects of different K rates on K content in flue-cured tobacco leaves and the subsequent economic benefits were studied in a field trial in Zhengning county, Qingyang city, Gansu province in 2007. The four K rates were 0, 90, 180, and 270 K₂O kg/ha (treatments K0, K1, K2 and K3). The K content in flue-cured tobacco leaves increased with K fertilization rates and reached a peak at the rate of 270 K₂O kg/ha. The response of K content in leaves to K application differed with leaf position, and the most sensitive response was in the middle leaves. K fertilizer application had significant effects on the order of K content in upper, middle, and bottom leaves, which changed in K1, K2, and K3 treatments compared with K0. The flue-cured tobacco yield, average price, ratio of mid-high grade leaves, output value, and other economic benefit parameters were all increased with increased K fertilizer rate. Therefore increased K fertilizer application could increase economic benefits of flue-cured tobacco by enhancing yield and improving quality. In this field trial, the best K application rate was at least 270 K₂O kg/ha.

CLC Number:

HU Juan, QIU Hui-zhen, HE Xiu-cheng, ZHANG Wen-ming,
LI Ya-juan, ZHANG Chun-hong. Effects of potassium fertiliser on potassium content in flue-cured tobacco leaves and the economic benefits in Gansu province[J]. Acta Prataculturae Sinica, 2010, 19(5): 156-160.

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