论文部分内容阅读
为了解水、氮供应水平对河西绿洲灌区甜叶菊(Stievia rebaudiana)光合作用和产量的调控效应,研究了灌溉量(常规灌溉,320mm;节水20%,灌溉256mm;节水40%,灌溉192mm)和施氮量(0、100、200、300kg·hm-2)对甜叶菊光合特性和产量的影响。结果表明:与不施氮相比,施氮可显著提高甜叶菊不同生育期光合速率和产量,施氮处理间光合速率和产量差异均不显著;灌溉量从192mm增加到320mm,甜叶菊产量随灌溉量的增加先增加后降低。施氮100、200、300kg·hm-2下甜叶菊产量分别较不施氮增产6.00%、9.17%、9.76%,256mm灌溉量和300kg·hm-2施氮量为甜叶菊高产的最优组合,产量达到4 177.50kg·hm-2。
In order to understand the regulatory effect of water and nitrogen supply on photosynthesis and yield of Steievia rebaudiana in Hexi Oasis irrigation area, the effects of irrigation amount (conventional irrigation, 320mm; water saving 20%, irrigation 256mm; water saving 40%, irrigation 192mm ) And nitrogen (0,100,200,300kg · hm-2) on the photosynthetic characteristics and yield of Stevia rebaudiana. The results showed that compared with no nitrogen application, nitrogen application could significantly increase the photosynthetic rate and yield of Stevia rebaudiana at different growth stages. There was no significant difference in photosynthetic rate and yield between the two treatments. The irrigation volume increased from 192mm to 320mm, The increase in irrigation volume first increased and then decreased. The optimal combination of Stevia rebaudiana yield and yield of Stevia rebaudiana was 6.00%, 9.17% and 9.76% at nitrogen application rates of 100, 200, and 300 kg · hm-2, respectively. , The output reached 4 177.50kg · hm-2.