摘要
对棉地粮经三熟制中春玉米 +棉花的共生期、不同移栽密度、间作棉的施氮技术以及应用生长调节剂DPC等措施在杭州和衢州两地分别进行试验。结果表明 ,间作会影响棉花的产量 ,但衢州的气候条件有利于发展间作棉 ,共生期应控制在 50天以内。衢州的间作棉种植密度以 3.0～4 .5万株·hm 2 为宜 ,杭州以 5.2 5万株·hm 2 为宜 ,而春玉米以 3.75万株·hm 2 较佳。间作棉的氮用量应在 90kg·hm 2 左右 ,且以基肥和春玉米采收后两次施用为好。应用DPC能显著增加间作棉的产量 。
The effects of intergrowth span,transplanting density,nitrogen and DPC plant growth regulator on intercropping cotton between spring maize and cotton were investigated in two sites of Hangzhou and Quzhou in Zhejiang Province,respectively.The results indicated that the intercropping between spring maize and cotton influenced the yield of cotton.The span of intergrowth within 50 days had little influence on cotton.The appropriate density of cotton was 30-45 thousand plant·hm -2 in Quzhou area,52.5 thousand plant·hm -2 in Hangzhou area,while for spring maize was 37.5 thousand plant·hm -2 .The suitable level of nitrogen application was about 90 kg·hm -2 ,and it was applied in two times when cotton was transplanted and just after spring maize was cut.DPC application could increase the yield of cotton significantly,and improve the economic characteristics of intercropping cotton as well.
出处
《浙江农业学报》
CSCD
2001年第1期8-12,共5页
Acta Agriculturae Zhejiangensis
基金
浙江省"九五"重点课题! (96 110 2 2 2 6 )
关键词
棉花
春玉米
间作
共生期
旱地
多熟制
Gossypium hirsutum L.
Zea mays L.
intercropping
intergrowth span
