【摘要】：為選育氮高效品種,減少氮肥施用量,試驗(yàn)以黑龍江省24個(gè)不同基因型玉米品種為材料,采用盆栽方式,在N200 kg·hm~(-2)氮水平下研究抽雄期玉米品種干物質(zhì)積累、總氮含量、氮素干物質(zhì)生產(chǎn)效率、氮吸收速率、氮肥利用效率,分析各玉米品種干物質(zhì)積累及氮利用率特性,為黑龍江省氮高效玉米品種選育和栽培提供理論依據(jù)。根據(jù)聚類分析結(jié)果,將24個(gè)不同基因型品種分為低氮高效型(Ⅰ)、低氮中效型(Ⅱ)和低氮低效型(Ⅲ),分別占12.5%,37.5%和50.0%。Ⅰ型品種各項(xiàng)指標(biāo)均顯著高于其他品種。相關(guān)分析表明,氮素干物質(zhì)生產(chǎn)效率與總干重、總氮含量、氮吸收速率呈極顯著正相關(guān),與氮肥利用效率呈顯著正相關(guān);通徑分析表明,氮素干物質(zhì)生產(chǎn)效率與總干重呈顯著相關(guān),總干重對(duì)氮素干物質(zhì)生產(chǎn)效率貢獻(xiàn)較大。
[Abstract]:In order to select high-efficiency varieties of nitrogen and reduce the amount of nitrogen fertilizer applied, the dry matter accumulation of 24 different genotypes of maize varieties in Heilongjiang Province was studied under the nitrogen level of N200 kg hm~ (-2) by pot culture. Total nitrogen content, nitrogen dry matter production efficiency, nitrogen absorption rate, nitrogen fertilizer utilization efficiency, dry matter accumulation and nitrogen utilization efficiency of maize varieties were analyzed, which provided theoretical basis for breeding and cultivation of high-efficiency nitrogen maize varieties in Heilongjiang Province. According to the results of cluster analysis, 24 genotypes were classified as low nitrogen efficient type (鈪，

本文編號(hào)：2361626