摘要
为探索环渤海低平原区冬小麦在限采条件下的最佳播期播量和最佳的空间分布状态,以‘沧麦6005’为试验材料,通过裂区试验设计,以播期为主处理,设5个水平(A1~A5),以播量为副处理,设4个水平(B1~B4),研究了‘沧麦6005’的群体结构、干物质积累、叶面积指数及产量。结果表明:随着播期的推迟,产量、群体数量均呈降低趋势;在较为适宜的播期条件下,随着播量的增大,产量、群体数量出现先增加后降低的趋势;当播期较晚时增加播量可以提高产量;适期播种有利于提高叶面积指数和群体干物质量的积累;适当晚播可以减少无效分蘖和无效叶面积,提高成穗率。不同行距对小麦产量影响显著,行距为20 cm时为最佳。分析认为环渤海低平原区‘沧麦6005’的适宜播期为10月3日到10月13日,适宜密度为375万/hm^2到450万/hm^2基本苗。
The article aims to explore the optimum combination of sowing date, planting density and bestspatial distribution under the limited irrigation for winter wheat in low plain around Bohai.‘Cangmai6005＇was used as material, a split plot design was conducted with 5 sowing dates（A1-A5） as main treatment and 4planting densities（B1-B4） as secondary treatment. The group composition, dry matter accumulation, leaf areaindex（LAI） and yield of‘Cangmai 6005＇were studied. The results showed that the population quantity andyield decreased with the delay of sowing date. Under suitable sowing time, the population quantity and yieldincreased first and then decreased with improved sowing density. Increasing sowing density in late sowing timecould increase the yield. Suitable sowing time was helpful to increase the LAI and dry matter accumulation ofpopulation. Proper late sowing could reduce the invalid tillers and invalid leaf area to raise the spike rate.Different row spacing had an obvious influence on wheat yield. The best row spacing was 20 cm. It is suggestedthat the sowing date from October 3^rdto 13 ^thand the sowing density from 3.75 million/hm^2 to 4.5 million/hm^2 are suitable for‘Cangmai6005＇in low plain around Bohai.
出处
《中国农学通报》
2016年第21期32-37,共6页
Chinese Agricultural Science Bulletin
基金
国家科技支撑计划"低平原雨养旱作区增产增效技术模式研究与示范"(2013BAD05B0504)
关键词
小麦
播期
播量
行距
群体性状
产量
wheat
sowing date
planting density
row spacing
population quality
yield
