摘要
以3对不育系及其同型保持系为材料,研究了始花期不同氮肥追施量对大豆制种母本结实率的影响。结果表明:追施氮肥对不同异交率母本的结实率影响不同,高异交率不育系绥农8BC10的结实率随着氮肥用量的增加而降低,相对低异交率不育系绥农14BC8和吉林47BC7的结实率随着氮肥用量的增加而增加,并在T4处理(133.33 kg.hm-2)时结实率最高。追施氮肥对父本结荚数影响不大,其中绥农14追施氮肥后结荚数减少,且在T5(166.67 kg.hm-2)施氮量时达到最小,绥农8和吉林47的结荚数随着施氮的增加无明显变化;另外,追施氮肥对不同细胞质类型母本结荚数影响较大,绥农8BC10在T5处理(166.67 kg.hm-2)时结荚数最高,吉林47BC7随着追肥量增加结荚数也增加,在T4处理(133.33 kg.hm-2)时达最高,而绥农14BC8的结荚数随着施氮量的增加而降低。总之,不同氮肥追施量对大豆父本结荚数影响不大,而对母本结荚数和结实率都产生重要影响。
Three soybean male sterile lines and maintenance lines were used as materials to study the effects of different nitrogen fertilizer levels on seed setting rate of female parents.Nitrogen fertilizer was top dressed at R1 stage.The results showed that,as the nitrogen fertilizer amount rising,the seed setting rate of high outcrossing rate male sterile line（Suinong8BC10） was falling and the seed setting rates of low outcrossing rate male sterile lines（Suinong14BC8,Jilin47BC7） were increasing,in which T4 treatment（133.33 kg·ha-1） was the highest.Moreover,nitrogen top dressing had little effect on pod number of male parent,pod number of Suinong14 decreased with the increasing of fertilizer amount and the lowest value appeared in T5 treatment（166.67 kg·ha-1）,while pod number of Suinong8 and Jilin47 remain stable.However,pod number of female parent significantly influenced by the amount of nitrogen fertilizer,pod number of Suinong8BC1 and Jilin47BC7 increased with fertilizer amount and peak value appeared in T5（166.67 kg·ha-1） and T4（133.33 kg·ha-1）,respectively.Besides,pod number of Suinong14BC decreased with the increasing of nitrogen fertilizer amount.In conclusion,nitrogen top dressing had little effect on pod number of male parent,while it has remarkable effects on the seed setting rate and pod number of female parent.
出处
《大豆科学》
CAS
CSCD
北大核心
2010年第4期724-726,共3页
Soybean Science
基金
国家高技术研究发展计划资助项目(2009AA100101)
关键词
大豆
结实率
氮肥追施量
Soybean
Seed-setting rate
Nitrogenous fertilizer quantity
