摘要
探讨不同播期和种植密度对糯玉米产量和于物质积累的影响,为糯玉米合理套作甘蔗提供理论依据.采用裂区设计,以不同糯玉米播期为主处理,分别设为2月18日、2月28日和3月10日;以不同糯玉米种植密度为副处理,分别设为0（纯种甘蔗）、3.0、3.9、4.8万株/hm24个水平;研究不同播期和种植密度条件下套作甘蔗的糯玉米产量、叶面积和干物质积累等的变化规律.结果表明,随着播期的推迟,套作甘蔗的糯玉米产量表现为早播≥中播＞晚播,早播的糯玉米群体棒三叶长和棒三叶面积显著大干晚播的;在3.0～4.8万株/hm2密度范围内,增加套作甘蔗的糯玉米的种植密度,有利于增加糯玉米的产量、群体叶面积和干物质总量;以糯玉米“4.8万株/hm2＋早播或中播”套作甘蔗的种植模式效益最好.
The objective of the study is to elucidate the effect of different sowing dates and denaities on corn yield and dry mater accumulation in waxy corn and sugarccane relay intercropping system.A split plot design with three maize sowing dates on Feb.18,Feb.28 and Mar.10 as the main treatment,and four maize densities in 0,30 000,39 000 and 48 000 plants/ha as secondary treatment was conducted to study the regulation of maize groups yield,leaf areas and dry matter accumulation in maize and sugarcane relay intercropping system.With delayed sowing date,yield order was early sowing≥ middle sowing ＞ late sowing.Three-ear-leaf length and thr ee-ear-leaf area of early sowed maize were significantly greater than those oflate sowed maize.Within the range of 30 000-48 000 plants/hm2,increasing density was beneficial for increasing yield,group leaf area and totaldry matter content of waxy com.The planting mode of 48 000 plants/ha ＋ early or middle sowing of waxy corn and sugarcane relay intercropping was the best.
出处
《西南农业学报》
CSCD
北大核心
2014年第1期71-75,共5页
Southwest China Journal of Agricultural Sciences
基金
广西农科院玉米研究所基本业务费专项〔玉201007(基)〕
关键词
糯玉米
甘蔗
套作
播期
密度
产量
干物质积累
Waxy corn
Sugarcane
Relay intercropping
Sowing date
Density
Yield
Dry matter accumulation
