【摘要】 通过马铃薯覆膜滴灌大田试验,研究了灌溉定额、灌水次数对马铃薯光合性能影响;研究了马铃薯光合性能对产量的影响特性。试验结果表明:在整个生育期内,马铃薯光合性能(蒸腾速率、气孔导度和光合速率)均呈先增后减的变化规律,在马铃薯块茎形成期最大、块茎增长期开始逐步减小,到成熟期骤减,几乎停止光合作用;覆膜滴灌马铃薯时,灌溉定额越大,灌水次数越多,蒸腾速率、气孔导度、光合速率就越大;蒸腾速率、气孔导度均与产量呈显著相关关系,光合速率与产量呈极显著相关关系。提高光合作用,将有助于作物产量的提高。更多还原

【Abstract】 The field experiment of film mulching drip irrigated for potato is carryed out to study the effects of different water irrigation quota and irrigation frequencies on photosynthetic performance of potato and its effects on yield of potato.The result shows that,throughout the growth period,the photosynthetic performance of potato,including transpiration rate,stomatal conductance and photosynthesis rate,present the change law of first increased and then decreased.It is the largest in the tuber-formation period,then gradually decreases in tuber-growing period,and nearly stops in maturity period.When potato is under film mulching drip irrigation,the more irrigation quota and shorter irrigation cycle,the higher transpiration rate,stomatal conductance and photosynthesis rate.The transpiration rate and stomatal conductance are significantly correlated with the yield,while the relation between photosynthetic rate and yield is highly significant correlation.Increasing photosynthesis will contribute to the improvement of crop yield.更多还原