关键词: 畜禽业,  , 粪尿养分, 氮, 磷, 时空变异, 环境风险

Abstract: Taking the potato cultivar 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 polymer 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 C₁ increased 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 F_v/F_m,(F_m′-F_o′)/Fm′,q_P, and ETR in treatments C₁, C₂, and C3 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 chlorophyll fluorescence parameters, manifesting in the increase of photosynthetic efficiency, and thus, improved the tuber yield of upland potato.

Key words: livestock and poultry industry, manure nutrient, nitrogen, phosphorus, spatiotemporal variability, environmental risk.