由于受气候条件的限制和旧的生产方式的束缚,历史上,在炎热的夏季无人种白菜,因而形成每年3—9月份人们吃不上包心大白菜。为了解决这一难题,作到大白菜一年多熟和大白菜的周年供应,长葛县蔬菜研究所开展了大白菜多季生产栽培技术研究。针对社会需要,以高产、优质、高效益为目的,主攻抗热栽培技术,开展了夏季抗热栽培品种、播期、密度、灌水、种植方式和病虫防治等试验,经过研究与应用,效果相当显著,填补了夏季不产大菜的空白。在大白菜生产技术上是一次新突破。1991年8月通过现场验收和技术签定。为了满足广大菜农的需要,有计划地先后举办48期春夏大白菜技术培训班,已培训679人。已推广到河北栾城、邯郸、山西汾阳、临猗、安微阜南、阜 Due to the climatic conditions and the shackles of the old mode of production, in the history of the desert in the hot summer cabbage, which formed from March to September each year, people can not eat cabbage. In order to solve this problem, made more than a year of Chinese cabbage and annual supply of cabbage, Changge County Institute of Vegetables carried out a multi-season cabbage production and cultivation techniques. In response to the needs of the community, with the aim of high yield, high quality and high efficiency, the main heat-resistant cultivation techniques are carried out. The tests of heat-resistant cultivars, sowing dates, planting density, irrigation, planting methods and pest control in summer are carried out. Quite significant, to fill the gaps in the summer does not produce dishes. In cabbage production technology is a new breakthrough. August 1991 through the site acceptance and technical signing. In order to meet the needs of the majority of farmers, there are 48 planned spring and summer Chinese cabbage technical training has been organized, 679 people have been trained. Has been extended to Hebei Luancheng, Handan, Shanxi Fenyang, Lintao, Ann micro-Funan, Fu