咸阳春甘蓝适宜播种期精细化区划

Fine Division for Suitable Sowing Periods of Spring Cabbage in Xianyang

利用咸阳12个国家气候观测站1991—2020年近三十年最新气象观测资料,结合2020年咸阳旬邑春甘蓝生产试验数据,研究咸阳春甘蓝适播期精细化区划,以期为春甘蓝在咸阳规模种植提供科学依据。通过分析影响春甘蓝营养生长阶段的主要气候因子,筛选出日平均气温和日最低气温≤12.0℃的天数2个精细化指标。结果表明,咸阳十二个县区都适宜春甘蓝生长,且春甘蓝适宜播种日期由南向北推迟,最早播种日期为2月13日(三原、泾阳、兴平、秦都、渭城渭河沿岸一带),最迟的为3月30日(旬邑县马栏镇、清源镇,长武县土家镇),最早与最晚播种日期跨度比较大相差45 d。

Based on the latest meteorological observation data from 12 national climate observation stations in Xianyang from 1991 to 2020 and combined with the production test data of spring cabbage in Xunyi county of Xianyang in 2020,the fine division for the suitable sowing time of spring cabbage in Xianyang was studied,so as to provide scientific basis for the large-scale planting of spring cabbage in Xianyang.By analyzing the main climatic factors affecting the vegetative growth stage of spring cabbage,two indexes were selected for daily mean temperature and the number of days when the daily minimum temperature was less than or equal to 12.0℃.The results showed that 12 counties in Xianyang are suitable for the growth of spring cabbage,and the suitable sowing date is postponed from south to north.The earliest sowing date is February 13 in Sanyuan,Jingyang,Xingping,Qindu and Weicheng district along the Weihe River,while the latest date is March 30 in Malan Town,Qingyuan Town in Xunyi County,and Tujia Town in Changwu County The earliest and the latest sowing date span is 45 days.