氮肥减量配施生物有机肥对茄子生长、光合特性及养分吸收的影响OA

Using the eggplant variety'Lushuai'as the test material,CK(no fertilization at all),and treatments of T1(single application of bio-organic fertilizer,3000 kg/hm2),T2(single application of chemical fertilizer),T3(10%reduction of nitrogen by chemical fertilizer+1800 kg/hm2 of bio-organic fertilizer)and T4(20%nitrogen reduction by fertilizer+2400 kg/hm2 of bio-organic fertilizer)were set,to explore the effects of nitrogen reduction combined with bio-organic fertilizer on the growth,photosynthetic characteristics and nutrient absorption of eggplants in the rounded greenhouse,with a view to screening the appropriate bio-organic fertilizer combined application scheme.The results showed that at different growth stages,the T3 treatment had higher plant height,stem diameter and root activity,and the root volume was significantly increased by 31.52%compared with the T2 treatment.The content of photosynthetic pigments,photosynthetic gas parameters and chlorophyll fluorescence parameters were better in the T3 treatment.Its transpiration rate was significantly increased by 81.56%compared with CK,and the actual photochemical efficiency(ΦPSII)was significantly increased by 4.76%to 10.00%compared with other treatments.In addition,in different organs of eggplants,the nutrient content in the T3 treatment was increased to varying degrees compared with other treatments.Based on the growth,photosynthetic characteristics and nutrient content of eggplants,the T3 treatment was the best fertilization scheme.