苹果发酵液改良盐碱土的效应及其对水稻生长的影响OA

Saline-alkali soil is a major constraint to agricultural production development,and biological amelioration techniques have gained widespread attention due to their eco-friendly and sustainable characteristics.Used rice(Oryza sativa L.)as the test crop and systematically investigated the effects of different concentrations of apple fermentation broth(diluted at 1∶25,1∶50,1∶100,1∶200)on saline-alkali soil amelioration and rice growth using pot experiments.The results showed that apple fermentation broth significantly improved soil physicochemical properties,JS25 treatment reduced soil pH from 10.08 to 9.74,increased total phosphorus content by 103.1%,and available potassium by 94.8%.The fermentation broth significantly promoted rice growth,compared to the control,JS25 treatment increased plant height,stem length,and root length by 54.2%,115.7%and 61.4%,respectively,and total fresh weight by 74.2%.The treatment significantly increased chlorophyll content(increased by 50.0%～189.6%),decreased proline content(reduced by 27.1%～74.9%),increased MDA content(increased by 17.9%～87.9%),and enhanced antioxidant enzyme activities(CAT and SOD increased by 60.5%～232.2%,23.9%～119.1%,respectively),indicating that the fermentation broth activated the antioxidant defense system in rice to cope with saline-alkali stress.The study revealed the mechanism by which apple fermentation broth promotes rice growth in saline-alkali soil through improving soil physicochemical properties and regulating plant physiological metabolism,providing theoretical basis and technical support for the application of fruit and vegetable fermentation broth in saline-alkali land amelioration.