摘要
1989-1991年,用不同株型的玉米品种进行麦/玉米/甘薯旱地间套作试验。采用群体多维分层切片,分析了玉米群体的叶面积等形态性状和光照特征表明:叶片反向互生性是玉米的固有特性.通常分布在方位角18°9’以内:在群体高度(Y)距茎距(X)和开张距(Z)区间上的三个非线性方程构成了叶面积分布空间,并由此求得叶面积分布的密集区间(占总叶面积80％);群体内光照条件受太阳高度角的日变化的影响极大,并随着距茎距的缩小和群体高度的降低而明显变差。为使间套的两种作物都能高产稳产,应避免叶面积密集区间重叠,即株距应保持在29.6cm左右,大行距应大干90cm。另外,本文还对株距与行距的关系进行了讨论。
The wheat/maize/sweet potato triple cropping pattern trial were conducted on the upland during 1989-1991. The morphological characters such as leaf area and the light change feature for different plant types of maize population were analyzed by the multidimensional straitified section. The backward alternate property of leaf blades was the specific property of maize, and leaf blades generally distributed in the area of azimuth 18°9'. The nonlinear equations formed by population height (Y), the distance from stem 'DFS' (X) and the distance of divergence 'DD' (Z) decieded the distributional space interval of the leaf area, and calculated the condensed space interval of leaf area (80% of the total leaf area). The population light conditions were greatly influenced by the daily change of sun elevation angle, and evidently became bad with shortenning of DFS and dropping of population height. In order to get high and stable yield for the two interplanting crops, the seed spacing should be 29.6 cm and the large row spacing should surpass 90 cm to aviod overlap of the condensed space intervals of maize leaf areas. Furthmore, the relations between seed spacing and row spacing were discussed.
出处
《浙江农业学报》
CSCD
1992年第4期159-163,共5页
Acta Agriculturae Zhejiangensis
关键词
玉米
间作
叶面积
群体
栽培
套作
Maize
Intercropping
Leaf area
Nonlinear equation
Condensed space intervals
Light
