摘要
以"陇薯3号"为材料,设C1(0.5%保水剂+钾肥60g·hm-2)、C2(钾肥60g·hm-2)、C3(0.5%保水剂)、CK(对照)4个试验组,测定叶绿素荧光参数、块茎产量、商薯率等产量指标,从光合效能的角度探讨了保水剂、钾肥对旱地马铃薯叶绿素荧光参数和块茎产量的影响。结果表明:C1处理的出苗率较对照组显著提高9.4%;所有处理的冠幅、茎粗等指标不同程度地高于对照;除C3组中的NPQ值低于对照之外,其余处理的叶绿素荧光参数Fv/Fm、(Fm'-Fo')/Fm'、qP、ETR日均值较CK均有不同程度提高,(Fm'-Ft)/Fm'日变化成"V"型;C1组商薯产量最高;保水剂和钾肥直接影响马铃薯叶绿素荧光动力学参数,增强其光合效能,从而提高旱地马铃薯商品薯产量。
Taking the potato cuhivar Longshu-3 as the object, this paper studied the tuber yield and chlorophyll fluorescence parameters under effects of different applications of super absorbent polymer and potassium fertilizer, aimed to approach the effects of applying super absorbent poly- mer and potassium fertilizer on the yield index and chlorophyll fluorescence parameters of dry land potato from the viewpoint of photosynthetic efficiency. Four treatments were installed, i. e. , 0.5% of super absorbent polymer ＋ 60 g · hm-2 of potassium fertilizer （ C1 ）, 60 g · hm-2 of potassium fertilizer （ C2 ）, 0.5% of absorbent polymer （ C3 ）, and no super absorbent polymer ＋ no potassium fertilizer （CK）. As compared with CK, the emergence percentage in treatment CI in- creased significantly by 9.4%. The crown and stem diameter in treatments C1, C2, and C3 were all higher than those in CK, and, except the NPQ in treatment C3 being lower than that in CK, the mean diurnal Fv/Fm, （Fm＇-Fo＇）/Fm＇, qP, and ETR in treatments Cl, C2, and C3 were also increased to some extent. The yield index was the highest in C1. All the results indicated that super absorbent polymer and potassium fertilizer had direct effects on the potato plant chloro- phyll fluorescence parameters, manifesting in the increase of photosynthetic efficiency, and thus, improved the tuber yield of upland potato.
出处
《生态学杂志》
CAS
CSCD
北大核心
2013年第5期1221-1226,共6页
Chinese Journal of Ecology
基金
国家自然科学基金项目(30960060
31160118)
甘肃省科技支撑计划项目(2009GS03453)
兰州市科技发展计划项目(2010-2-126)资助
关键词
半干旱地区
光合效能
产量指数
semiarid region
photosynthetic efficiency
yield index.
