密植对金海5号玉米产量及品质的影响

在大田种植条件下,以郑单958为对照,研究了中密度(52500株/hm2)、高密度(75000株/hm2)种植对金海5号玉米产量和品质的影响。结果表明,两品种在高密度下产量均显著高于中密度;中密度条件下,金海5号产量显著高于郑单958;在高密度种植条件下,两品种穗长、行粒数和百粒重都显著降低;两品种子粒可溶性糖、蔗糖和粗淀粉含量高密度条件下都高于中密度;郑单958子粒容重高密度条件下显著降低,而金海5号子粒容重受密度影响较小。     

种植密度对玉米茎秆和穗部性状的影响

以郑单958、金海5号为试验材料,研究在中密度(52 500株/hm²)、高密度(75 000株/hm²)条件下对茎秆和穗部性状的影响。结果表明：高密度条件下,两个品种株高和穗位高受影响均不显著,除第1节间茎秆长度显著增加外,其他节间受密度影响不显著,而基部(第3节间)茎的粗度显著减少;中密度条件下,金海5号各节间茎秆穿刺强度均显著大于郑单958。高密度条件下,金海5号各节间茎秆穿刺强度显著减弱,而郑单958除第3节间穿刺强度显著减弱外,其他节间没有明显变化。高密度条件下,穗长、行粒数和百粒重都显著降低。两个品种在高密度下的产量均显著高于中密度。     

密度对不同株型的玉米农艺、根系性状及产量的影响

Density is the key factor of maize high-yield cultivation.Effects of planting density on agricultural characters,root system characters and yield were studied using different maize plant type semi-compact maize Jinhai 5,compact maize Zhengdan 958.The result showed that with the increasing of density,plant height was increased,stem diameter and ear diameter was decreased,ear was shorten,rare top length,No.of ear nod,ear height was increased,brace root number and total root number was decreased,the rate of root dry weight was increased within farming layers,population dry matter accumulation was increased and plant dry matter accumulation presented the opposite trend,ear linage,kernels per ear,100-kernels weight,double-ear rate,plant yield was decreased,yield was increased and decreased successively.The relation between yield and density of Jinhai 5 was Y=-625.67x²+9 044.5x-18 530,optimal plant density was 7.0×10⁴-7.5×10⁴ plants/ha,the relation between yield and density of Zhengdan 958 was Y=-375.67x²+6 410x-13 043,optimal plant density was 8.5×10⁴-9.0×10⁴ plants/ha.Analysis revealed the number of brace roots and total roots could be used as an indicator for plant dry weight and yield.     

金来8号的特征特性及高产稳产栽培技术

介绍了2013年山东省审定的玉米品种金来8号的特征特性,指出其具有稳产、高产、抗性强、适应性广等特点;从选地、整地、施肥和玉米生长的不同时期的栽培管理、病虫害防治等方面,阐述了金米8号高产稳产栽培技术,以指导其栽培。