To reveal the suitable planting density of new maize variety‘Wanyu 708’, and provide a basis for the promotion and high yield of‘Wanyu 708’, tests were conducted at the experimental field of Suzhou Academy of Agriculture for two consecutive years. Six density treatments were set at 45000-90000 plants /hm2 with 7500 plants /hm2 as the density ladder, and the yields and correlated characters were analyzed. The results showed that a parabolic relation existed between yield per unit area and density. The highest yield was obtained at the density of 67480 plants/hm2, and then the decrease range of yield was small with density increasing, the yield showed a smoothly decreased trend. The yield was negatively correlated with grain number per corncob, but the relation between yield and thousand-grain weight was not significant. Therefore, the best planting density of‘Wanyu 708’is 67500 plants/hm2, and the application of corncob fertilizer under planting density increasing is an effective way to obtain high yield.
Key words
Maize; Planting Density; Yield;‘Wanyu708’; Grain Number per Corncob
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] Mann C C. Crop scientists seek a new revolution[J]. Science,1999(283):310-314.
[2] 刘景辉,王志敏,李立军,等.超高产是中国未来粮食安全的基本技术途径[J].农业现代化研究,2003,24(3):161-165.
[3] Tollenaar M, Lee E A. Yield potential, yield stability and stress tolerance in maize[J]. Field Crops Research,2002(88):161-169.
[4] Sundaresan V. Control of seed size in plants[J]. PNAS,2005,102(50):17887-17888.
[5] 佟屏亚,程延年.玉米密度与产量因素关系的研究[J].北京农业科学,1995,13(1):23-25.
[6] 莫惠栋.穗数-密度的理论曲线方程及其分析[J].作物学报,1964,3(3):327-342.
[7] Ottariano E, Camussi A. Phenotypic and genetic relationships between yield components in maize[J]. Euphytica,1981(30):601-609.
[8] 王楷,王克如,李少昆,等.密度对玉米产量(>15000 kg/hm2)及其产量构成因子的影响[J].中国农业科学,2012,45(16):3437-3445.
[9] 杨吉顺.种植密度和行距配置对超高产夏玉米产量形成的影响[D].泰安:山东农业大学,2010.
[10] 刘兴舟,李猛,张建.皖北地区主栽品种密度对产量及其构成因子的影响[J].中国农学通报,2014,30(18):145-150.
[11] Grassini P, Thorburn J, Burr C, et al. High-yield irrigated maize in the Western US cron belt: I. On-farm yield,yield potential, and impact of agronomic practices[J]. Field Crops Research,2011(120):142-150.
[12] Tollenaar M, Wu J. Yield improvement in temperate maize is attributable to greater stress tolerance[J]. Crop Science,1999(39):1587-1604.
[13] Echarte L, Luque S, Andrade H H, et al. Response of maize kernel number to plant density in Agentinean hybrids released between 1965 and 1993[J]. Field Crops Research,2000(68):1-8.
[14] Bavec F, Bavec M. Effect of maize plant double row spacing on nutrient uptake, leaf area index and yield[J]. Rost Vyroba,2001(47):135-140.
[15] 陈国平,王荣焕,赵久然.玉米高产田的产量结构模式及关键因素分析[J].玉米科学,2009,17(4):89-93.
{{custom_fnGroup.title_en}}
Footnotes
{{custom_fn.content}}