What trace element fertilizers can be applied to peanuts?
Which trace element fertilizers can be applied to peanuts? Please give an introduction. Trace elements play a role in the growth and development of peanuts that major elements (such as nitrogen, phosphorus, potassium, etc.) cannot replace. Scientifically increasing the application of trace element fertilizers is an important measure for high quality and high yield of peanuts. Iron fertilizer: for every 1 ton of dry matter formed by peanuts, 264...
Which trace element fertilizers can be applied to peanuts? Please give an introduction
Trace elements play a role in the growth and development of peanuts that major elements (such as nitrogen, phosphorus, potassium, etc.) cannot replace. Scientifically increasing the application of trace element fertilizers is an important measure for high quality and high yield of peanuts.
Iron fertilizer For every 1 ton of dry matter formed by peanuts, 264 grams of iron must be absorbed. When iron is deficient, the plants are short, have few branches, flower late, produce few flowers, have few root nodules, and have poor root development. In severe cases, the leaf veins lose green color and turn yellow, the upper leaves become yellowish white, and after a long time brown necrotic spots appear on the leaves until the leaves wither and die. Applying iron fertilizer on iron-deficient soil can generally increase peanut yield by more than 10%. Application methods: ① As base fertilizer, when preparing the land, apply 200-400 grams of ferrous sulfate per mu (mixed with organic fertilizer or superphosphate); ② As seed fertilizer, before sowing, soak the seeds in 0.1% ferrous sulfate solution for 24 hours, remove them, dry the seed coat, and sow; ③ Foliar spraying, during the pegging stage, pod-setting stage, or when yellowing symptoms appear on new leaves, spray the leaves with 0.2% ferrous sulfate solution, generally once every 5-6 days, for 2-3 consecutive sprays.
Boron fertilizer For every 1 ton of dry matter formed by peanuts, 44 grams of boron must be absorbed. When boron is deficient, the plants are short, have many branches, and appear clustered; the veins of the unfolding heart leaves are light in color, while the rest of the leaf is alternately dark and light green; the plants bear few or even no flowers, the roots easily age, the branching ability is weak, there are very few fibrous roots, and there are black spots at the root tips, which easily necrose; the kernels develop poorly; hollow pods with shells but no kernels easily form. Applying boron fertilizer on boron-deficient soil can increase peanut yield by 7.8%-22.5%. Application methods: ① As base fertilizer, apply 0.2-1 kg of boric acid or borax per mu (mixed with organic fertilizer or nitrogen and phosphorus fertilizers); ② As seed fertilizer, before sowing, soak the seeds in 0.02%-0.05% boric acid or borax solution for 4-6 hours, or mix 0.4 kg of boric acid or borax into each kilogram of peanut seeds; ③ As topdressing, use 50-100 grams of boric acid or borax per mu, mix it into a small amount of decomposed organic fertilizer, and apply it before flowering; ④ Foliar spraying, during the seedling stage, early flowering stage, and full flowering stage of peanuts, spray the leaves with 0.2% boric acid or borax solution.
Manganese fertilizer For every 1 ton of dry matter formed by peanuts, 39 grams of manganese must be absorbed. When manganese is deficient, the interveinal parts of the leaves turn yellow, while the leaf veins still tend to remain green. Applying manganese fertilizer on manganese-deficient soil can increase peanut yield by 8%-11%. Application methods: ① As base fertilizer, when preparing the land, apply 1.5-3.0 kg of manganese sulfate per mu; ② As seed fertilizer, before sowing, soak the seeds in 0.05-0.1% manganese sulfate solution for 12-24 hours; ③ Foliar spraying, starting 30-50 days after peanut sowing and ending 15-20 days before harvest, spray once every 10-14 days with 0.1% manganese sulfate solution; if necessary, it can be mixed with fungicides used to control peanut leaf spot disease.
Zinc fertilizer For every 1 ton of dry matter formed by peanuts, 9 grams of zinc must be absorbed. When zinc is deficient, banded chlorosis occurs on the leaves, usually on the leaves closest to the petiole, and in severe cases the entire leaflet loses green color. Applying zinc fertilizer on zinc-deficient soil can increase peanut yield by 12.5%-13.2%. Application methods: ① As base fertilizer, when preparing the land, apply 1 kg of zinc sulfate per mu; ② As seed fertilizer, before sowing, soak the seeds in 0.1-0.5% zinc sulfate solution for 12 hours, remove them, dry the seed coat, and sow.
Molybdenum fertilizer For every 1 ton of dry matter formed by peanuts, 1.32 grams of molybdenum must be absorbed. When molybdenum is deficient, crops usually show typical nitrogen deficiency symptoms; according to foreign research, even under completely molybdenum-free conditions, peanuts can continue to flower and set fruit, but their growth is inhibited. Applying molybdenum fertilizer on molybdenum-deficient soil can increase peanut yield by 11.93%. Application methods: ① As base fertilizer, when preparing the land, apply 50-100 grams of ammonium molybdate per mu (mixed with superphosphate); ② As seed fertilizer, before sowing, soak the seeds in 0.1-0.2% ammonium molybdate solution for 3-5 hours, or mix seeds with ammonium molybdate at 0.2-0.3% of the seed weight; ③ Foliar spraying, during the seedling stage and flowering stage of peanuts, spray the leaves with 0.1-0.2% ammonium molybdate solution.
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