保水剂对旱地马铃薯产量及叶片叶绿素荧光动力学参数的影响

Effects of super-aquasorbent composition on yield index and chlorophyll fluorescence parameters of dry-land potato

在自然条件非胁迫的基础上通过施用保水剂(0.10%,0.25%,0.50%,1.0%)来研究其对旱地马铃薯产量及光合的影响。结果表明:用0.50%的保水剂处理后,单株均产、商薯率及总产量最高;荧光动力学参数PSⅡ最大光量子产量(F_v/F_m)、相对电子传递速率(ETR)、荧光淬灭系数(qP和qN)等显著提高。因此,光合参数的变化与产量具有一致性,表明一定质量分数的保水剂能够调节土壤水分状况,间接影响植物的光合作用、生物量和产量,也说明旱地马铃薯具有适应干旱环境的生理特性。

Effects on yield and physiology of dry-land potato were studied under natural conditions, field plot experiments were conducted by using super-aquasorbent composition at five percentage levels, 0.10%, 0.25%, 0.50%, 1.0% and CK. The result show that the yield of potato of average individual plant the commodity rate and the total output were highest at 0.50%. In addition, maximal photochemical efficiency of PS Ⅱ in the dark （Fv/Fm）, relative electron transport rate （ETR）, and fluorescence quenching coefficient （qP ＆ qN） in its leaves were also significantly high at 0.50%. The responses of internal physiological mechanism in PS Ⅱ were consistent with the harvest yield, which shows that the available soil water was adjusted indirectly, and photosynthesis, biomass and harvest yield were infuenced indirectly by using given super-aquasorbent composition. It is concluded that dry-land potato has the physiological adjustability to drought.