摘要
在农业部阜新农业环境与保育科学观测试验站分别设置2行玉米:4行花生间作(2M4P)、4行玉米:4行花生间作(4M4P)和玉米单作、花生单作4个种植模式,开展不同种植模式对作物产量及产量构成因素、生物量和根系特征的影响研究。结果表明,2个间作模式的土地当量比(LER)为1.16-1.24,具有一定的产量优势和较高的土地利用效率。间作中的玉米干物质积累量与单作接近,间作花生干物质积累量较单作明显下降。对根系研究发现,间作减少作物的细根生长,2M4P、4M4P处理的比根长(SRL)较单作玉米和花生分别下降了25%、23%和18%、12%,复合系统作物根表面积密度(RSAD)在0-40 cm土层中能够占到总土层的80%以上,间作作物的RSAD显著高于单作,表明作物根系在表层分布较为密集,间作影响了作物的根系生长与分布。
Four modes include two rows of maize: four rows of peanut intercropping mode(2M4P), four rows ofmaize: four rows of peanut intercropping mode(4M4P), sole maize(M) and sole peanut(P). The effects on yield, bio-mass and root spatial distribution characteristics in four modes were investigated and analyzed. The results showedthat, the land equivalent ratio range(LER) of the two intercropping modes was 1.16-1.24, which had certain advan-tages of intercropping; Dry matter accumulation amount in intercropping maize modes was close to that in monocul-ture, but dry matter accumulation amount in intercropping peanut modes decreased significantly compared with thatin single cropping mode, which was caused by shading of maize; As intercropping reduced the growth of crop rootletand influenced the density distribution of the crop root surface area, the specific root length(SRL) in the 4M4 P and2M4P modes decreased respectively by 25%, 23% and 18%, 12% compared with monoculture maize and peanut;Root surface area density(RSAD) can be accounted for more than 80% of the total soil in 0-40 cm soil layer, andcrop RSAD was significantly higher than that of monoculture crop root. The results showed the crop root was more in-tensive, and the crop root growth and distribution were affected by intercropping.
出处
《玉米科学》
CAS
CSCD
北大核心
2016年第6期79-87,共9页
Journal of Maize Sciences
基金
国家自然基金国际合作项目(31461143025)
辽宁省自然联合封闭基金(2014027025)
辽宁省科技攻关项目(2014213004)
国家科技支撑计划项目(2012BAD09B00)
辽宁"百千万人才工程"培养经费资助项目(2013921058)
辽宁科学事业公益研究基金(2015002001)
关键词
玉米‖花生间作
土地当量比
干物质积累量
比根长
根表面积密度
Maize-peanut intercropping
Land equivalent ratio
Dry matter accumulation
Specific root length
Root surface area density