目前上海市郊农场三麦生产普遍采用了大播量、多苗多穗的大群体模式,基本苗高达35万,加上施肥不当,三麦生长后期群体过大,植株瘦弱,成穗率不高,穗小、粒少、粒重低,使近几年来产量徘徊在300～400斤左右,而用种用肥和农本却逐年升高。为此,农场局技术推广站组织了跃进、新海、东风、前进、红星、长江等场科研站进行了三麦栽培试验。并就品种、播种期、播种量、氮肥用量、施用时期,以及磷肥效果进行试验,以探索三麦高产低本的途径。 (一)品种、播量、氮肥用量 At present, Shanghai suburbs farms three wheat production generally used the large seeding volume, more sprouts and more spikes of the large group mode, the basic seedlings up to 350,000, together with improper fertilization, three wheat growing late groups are too large, thin plants, spike rate is not high , Spike small, less grain, low grain weight, so that output in recent years hovering at about 300 ~ 400 pounds, while the use of fertilizer and agricultural but has increased year by year. To this end, the Farm Bureau Technology Promotion Station organized Yuejin, Xinhai, Dongfeng, forward, Red Star, Yangtze River and other field research station conducted a three-wheat cultivation experiments. Experiments were carried out on the varieties, sowing dates, sowing amounts, nitrogenous fertilizer dosage, application period and phosphate fertilizer efficiency to explore the ways of high yield and low yield of Sanmai. (A) varieties, sowing, nitrogen consumption