Study on Suitable Planting Density for Stable High Yield of Summer Maize in Mid-South Henan Province
Yuan Liuzheng
Liu Jiayou
Zhang Lu
Wu Weihua
Fu Jiafeng
Yan Haixia
Wang Huiqiang
Zhang Yundong
Abstract：Six planting densities were designed to screen a suitable one for the two maize cultivar Zheng-dan 958(ZD958) and Luoyu 336(LY336).The results showed that ZD958 had stronger population self-reg-ulating ability and better tolerance to high density compared with LY336.The yield of ZD958 showed a linear increasing trend with the increase of planting density in a range of 3 500 ~6 000 plants per 666.7m2 .It reached the highest as 612.5 kg under the planting density of 6 000 plants per 666.7m2 .The optimum plant-ing density was 4 500 plants per 666.7m2 for LY336.The SPAD value was influenced largely by different planting densities and cultivars.The mean of SPAD value in LY336 was higher than that in ZD958.
Keywords：MaizePlanting densityYieldTolerance to high densitySPAD valueMid -south Henan Province
Publication Date：2015-04-02
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：3( 46-48 )