Photosynthetic efficiency and production of Annona squamosa L. under salt stress and fertilization with NPK

HIGHLIGHTS Electrical conductivity of water of 3.0 dS m-1 reduces the chlorophyll synthesis and production of custard-apple. NPK recommendation of 100-125-125, 125-125-100 and 125-125-125% cause more damage to the cell membrane. Reduction in the quantum efficiency of custard-apple under salt stress is indicative of photoinhi-bitory damage.【研究亮点】电导率为3.0 dS·m⁻¹的水体，会抑制番荔枝的叶绿素合成与产量形成。采用100-125-125%、125-125-100%及125-125-125%的氮磷钾推荐施肥配比，会对番荔枝的细胞膜造成更为严重的损伤。盐胁迫下番荔枝的量子效率降低，表明其发生了光抑制损伤。