摘要
本文报道不同氮素来源对马铃薯微型薯形成的影响。结果表明:NO_3^-—N 浓度与成薯指数呈直线负相关关系;NH_4^+—N 浓度与成薯指数呈二次抛物线形式;NO_3^-—N/NH_4^+—N 比值对微型薯形成的影响呈双曲线形式;当总氮浓度在30～40m 时,成薯指数有较大值;降低 NO_3^-—N/NH_4^+—N 比值或总氮含量有利于微型薯的形成。NO_3^-—N 与 NH_4^+—N 的最佳组合为[NO_3—N]=17.325mM,[NH_4^+—N]=16.612mM。
The effect or different kinds of nitrogen on the formation of potato microtuberwas studied in this report.The results were obtained as follows:There was anegative linear dependence between the concentration of NO_3^-—N and the indexof producing(IP).The effect of NH_4^+—N on IP followed quadratic curve.Thevalue of NO_3^-—N/NH_4^+—N affected the formation of microtuber fitting for hyper- bola curve.The value of IP was better when the total concentration of nitrogenwas 30～40mM.The tuberization of microtuber can be enhanced by reducingthe total uitrogen or decreasing the value of NO_63^-—N/NH_4^+—N.The best combi-nation wars(NO_3^-—N)=17.325m.M and(NH_4^+—N)=16.612m.M.
出处
《马铃薯杂志》
1991年第4期199-203,238,共6页
Chinese Potato Journal
