Vertical and lateral field fertilizing experiments were conducted to investigate the best potassium (K) fertilizer consumption and application of pepper in polytunnel greenhouse. The results indicated that the different application of potassium had significant effects on plant height, plant width, stem diameter, fruit length, fruit width and fruit weight with the N fertilizer 15.0 kg·667m-2 and P fertilizer 3.5 kg·667m-2. The relationship between pepper yields (y) and potassium(x) was y= -2.2743x2 + 53.402x + 802.45 (r2 = 0.973). The best optimum amount of potassium fertilizer was 11.74 kg·667m-2. Under the same background of N, P fertilizer, with the potassium fertilizer of 12.0 kg·667m-2, the different proportion of base fertilizer and topdressing of potassium had different effects on plant height, plant width, stem diameter, fruit length, fruit width and fruit weight. The proportion of base fertilizer and topdressing was 2∶8, the production index were higher than other treatments significantly.
YOU Shu-Ling
. The Optimum Amount and Operation of Potassium of Capsicum frutescens in Plastic Greenhouse[J]. Subtropical Plant Science, 2015
, 44(03)
: 255
-260
.
DOI: 10.3969/j.issn.1009-7791.2015.03.018
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