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在贵州的镇远县(海拔464m,北纬27°07′)用3个短光敏感程度不同的品种,在生育期间以自然光照(光周期平均近似值14L+1OD)为对照,用短光照(12L+12D、12.5L+11.5D及13L+11D)分别在全生育期、花前及花后处理。结果随短光而缩短生育期,但各品种的生育期到一定短光限度就不再缩短。平果豆为12.5L+11.5D,镇远青皮豆与黔豆一号13L+11D,且比当地自然光照时数缩短1～1.5小时已达极限。在极限以上光照,花期随缩短光照而缩短,开花总数也随之减少,表现最高开花数的光照时数,平果豆与黔豆一号为13L+11D,镇远青皮豆为14L+10D,(自然光照)。花后结荚平果豆的光照以12L+12D,镇远青皮豆以12.5L+11.5D,黔豆一号以13L+11D为适宜。荚果发育与籽粒充实各品种均为12L+12D短先照较优。说明开花结荚与鼓粒时以比自然光照缩短为有利。7～8月的高温对结荚鼓粒有严重影响,而影响程度随光照缩短而减轻。较长光照财有利营养生长。因此各品种具有一定最适光周期要求,以协调营养生长与生殖生长。
In Zhenyuan County of Guizhou Province (464m above sea level and 27o 07 ’north latitude), three light-sensitive cultivars with different short-light sensitivities were used to compare the natural light (average photoperiod 14L + 1OD) 12D, 12.5L + 11.5D and 13L + 11D) were treated during the whole growth period, pre-anthesis and anthesis respectively. The results shortened with the short duration of growth period, but the variety of the growth period to a certain short-term limit is no longer shortened. Pingguo beans 12.5L +11.5 D, Zhenyuan green beans and beans on the 1st 13L +11 D, and shorter than the local natural light hours 1 to 1.5 hours has reached its limit. In the light above the limit, the flowering period shortened with the shortening of the light, the total number of flowering also decreased, the highest number of flowering hours, Pingguo beans and Qian beans on the 13L + 11D, Zhenyuan green beans on 14L + 10D, ( Natural light). Flower pod Pingguodou light to 12L + 12D, Zhenyuan peas to 12.5L + 11.5D, Qian beans on the 1st to 13L + 11D suitable. Pod development and grain enrichment of all varieties are 12L +12 D short first according to better. Explain flowering pod and drum grain than the natural light shortening is advantageous. The high temperature from July to August had a serious impact on the pod bolus, while the degree of influence decreased with the light shortening. The longer the light is good for your health. Therefore, each species has a certain optimum photoperiod requirements to coordinate nutrition and reproductive growth.