高海拔冷凉区错期播种对娃娃菜生长、产量和品质的影响

Effects of different sowing time treatment on growth physiology,quality and yield of Brassica pekinensisin at high altitude cold area

【目的】筛选天祝县高海拔冷凉区娃娃菜适宜播种时期.【方法】采用大田试验,选择两个不同海拔高度试验地点(岔口驿村和金强驿村),设置6个播种时期,依次为4月25日、5月2日、5月9日、5月16日、5月23日、5月30日进行播种,研究了不同播期对娃娃菜生长、产量和品质的影响.【结果】两个不同海拔试验地娃娃菜在6个播种期内均可正常生长,全生育期天数随播期的延迟逐渐缩短;中、晚播处理下的株高要高于早播处理;在整个生育期中根长和长幅表现为:中播处理优于晚播处理与早播处理;随着播期的延迟,两地产量呈先增后减的趋势,分别在T_3,T_4处理达到最大值,为96.95,96.62t/hm^2;VC含量分别为T_3,T_4达到最大值,为3.54,3.58mg/g;硝酸盐含量都是T_4处理为最小值,分别为209.32,247.69mg/kg.【结论】综合产量品质,岔口驿村和金强驿村最佳播种时间分别为5月2日和5月9日.

【Objective】In order to screen sowing dates of Brassica pekinensisin in high altitude cold area in Tianzhu County,during the period of Brassica pekinensisin growth,the yield and quality in different sowing date treatments were studied in the experiment using field experiments.【Method】Sowing seed were designed at two altitude experiment sites and six sowing dates,on April25,May2,May9,May16,May23and May30.【Result】B.pekinensisin normally grew at two experiment sites and six sowing dates.The growth period was shorter with the delay of sowing date.The plant of and middle and late sowing was higher than early sowing,and the middle sowing had the optimum of root length.【Conclusion】The optimum sowing time in both sites is May2and May9for B.pekinensisin.