Abstract:

To optimize the combined application of boron and molybdenum fertilizers and improve the high-yield and high-efficiency cultivation technology system of Ningyuan small seed peanut, five different combined application treatments of boron and molybdenum fertilizers were set up to study the effects of different operation methods on nodule fresh weight, dry matter accumulation, economic coefficient, yield and yield composition of peanut. The results showed that: (1) seed dressing with boron and molybdenum fertilizer was very important for the development of root nodules, and could significantly increase the dry matter accumulation in each part of peanut. (2) Seed dressing with boron and molybdenum fertilizer + foliar spraying could promote the common development of aboveground and underground parts of peanut, significantly increase the average total dry matter per plant and pod weight, and was superior to only foliar spraying of boron and molybdenum fertilizer in improving the economic coefficient of peanut. (3) Seed dressing with boron and molybdenum fertilizer + foliar spraying could significantly improve the average total fruit number per plant, 100 fruit weight, 100 kernel weight, kernel rate, increase the average number of full fruit per plant, improve peanut yield of small seed peanut. In Ningyuan molybdenum-poor red soil area, it is suggested to use 0.2% borax + 0.2% ammonium molybdate for seed dressing, and foliar spray 0.1% borax + 0.1% ammonium molybdate at the beginning and end of flower needle. The method can effectively increase the yield of small seed peanut by 7.65% compared with no boron and molybdenum application.

Key words: boron and molybdenum fertilizer combined application, operation mode, small seed peanut, agronomic traits, yield