Effect Analysis of Increasing Planting Density on Yield of Summer Maize in Western Shandong Province
Zhang Sufang
Gao Shuang
Liu Fang
Zhang Jing
Wang Keru
Li Shaokun
Abstract：In order to study the suitable planting density and yield potential of high -yielding maize (>9 000 kg/hm2 ) in western Shandong , and explore the forming mechanism of high yield , the tests with 12 kinds of planting densities were conducted in 2012 and 2013 in Hantun Town of Chiping County and Qiji Town of Yanggu County respectively with Zhongdan 909 as material.The planting density was designed from 15 thousand to 180 thousand plants per hectare with 15 thousand as gradient .The results showed that in the two-year tests, the lowest and highest yields were 3 424.5 and 12 676.5 kg/hm2 respectively, and 10 treat-ments obtained the yield above 9 000 kg/hm2 .The analysis on yield components showed that to achieve the high yield above 9 000 kg/hm2 , the planting density should be in the range of 60 thousand to 135 thousand plants per hectare , and the number of harvested spikes should be from 60 thousand to 115 thousand per hectare .A parabolic relationship was present between yield per unit area and planting density , and the yield reached the highest at 97 thousand plants per hectare .With the increase of planting density , the grain number per spike and 1 000-grain weight increased firstly and then decreased .
Keywords：Summer maizeDensityYieldWestern Shandong area
Publication Date：2015-05-02
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：3( 40-42 )