一九七二年我们进行了麦——稻——稻三熟试验,获得了单产小麦240斤,早稻797.5斤,晚稻824.6斤(共计1862.1斤)的产量,小结如下。一年两熟改三熟、矛盾不断增多,主要是季节矛盾。早稻和晚稻生育朝共266天左右,小麦生育期205天左右,三季共需471天左右,一年相差约106天。必须做到眼观全年,立足高产,合理安排好季节和选好品种。我们选用中熟小麦5243,迟熟早稻矮幅九号,迟熟晚稻农垦58和中熟晚稻新选二号。并采取如下措施: In 1972, we conducted a wheat-rice-rice trial of three crops, yielding 240 kg of wheat per yield, 797.5 kg of early rice and 824.6 kg of late rice (1862.1 kg in total). The summary is as follows. Two cooked three years a year to change, increasing contradictions, mainly seasonal contradictions. Early rice and late rice fertility towards a total of about 266 days, wheat growth period of about 205 days, a total of 471 days for three seasons, a difference of about 106 days a year. Must be eye-sight all year, based on high yield, reasonable arrangements for the season and selected varieties. We use medium maturing wheat 5243, late maturing early rice short nine, late maturing late rice farming 58 and medium late rice new election on the 2nd. And take the following measures: