灌溉畜禽粪便沼液肥对辣椒光合作用及产量的影响

Effect of Irrigation of Livestock and Poultry Manure Biogas Slurry Fertilizer on Photosynthesis and Yield of Chilli Pepper

以畜禽粪便沼液为载体,配制畜禽粪便沼液配方肥,以空白和常规施肥为对照,研究不同浓度畜禽粪便沼液配方肥对辣椒光合作用及产量的影响。结果表明:畜禽粪便沼液肥对辣椒光合作用和产量均有明显提高和促进作用,且随沼液肥施用浓度不同影响程度不同。灌溉浓度30%时,辣椒叶片叶绿素含量最高,较常规无机肥高8.57%,净光合作用速率Pn、气孔导度Gs、胞间CO_2浓度Ci、蒸腾速率Tr、水分利用率WUE、气孔限制值Ls与常规施肥相比无明显提升,辣椒产量较常规无机肥高8.70%,差异显著。说明畜禽粪便沼液配方肥在农业生产中是一种优良的液态肥。

Livestock and poultry manure digested biogas slurry was used to prepare formulated biogas slurry fer- tilizer which was applied onto chilli pepper （ Capsicum annuum） to observe its effect on the photosynthesis and yield of chilli pepper, and compared with the blank and conventional fertilizer. The results show that the formu- lated biogas-slurry fertilizer significantly improved and promoted the photosynthesis and yield of the chilli pep- per, which varied to different extents with the increase in the concentration of the biogas-slurry fertilizer. When dressed with the biogas-slurry fertilizer at the concentration of 30% the chilli pepper leaves contained the highest chlorophyll, 8.57% higher than that of the conventional inorganic fertilizer, and their net photosynthesis rate （ Pn）, stomatal conductance （Gs）, intercellular CO2 concentration （ Ci）, transpiration rate （ Tr）, water utiliza- tion efficiency （WUE） and stomatal limiting values （Ls） showed no evident increase as compared to those of the conventional fertilizer. The chilli pepper dressed with the biogas-slurry fertilizer yielded 8.70% higher than that dressed with the conventional fertilizer, which was significantly different. This indicated that the biogas-slurry fertilizer is a good liquid fertilizer in agricultural production.