Recobrimento de sementes de algodão com fósforo, zinco e boro: efeitos imediatos e após o armazenamento

Abstract

The study aimed to evaluate the performance of seeds and seedlings of cotton coated with phosphorus, zinc and boron through physiological attributes before and after storage. For each treatment was used nutrient insecticide, fungicide, polymer and water to complete the syrup. Five doses were tested, namely: 0.0; 5.0; 10.0; 15.0 and 20.0 g.kg -1 seed phytin 0.0; 3.0; 6.0; 9.0; 12.0 g.kg -1 zinc sulfate and 0.0; 0.05; 0.10; 0.20; 0.30 mL.kg-1 boron. The evaluation of the physiological quality before the storage period was analyzed by germination, first count of germination, accelerated aging, dry weight of shoot and root, length of roots and shoots, plant height, crop growth rate, net assimilation rate, relative growth rate, leaf area index, speed of emergence and emergency field. Germination, first count of germination, accelerated aging, shoot length and root dry mass of shoots and roots, plant height, emergence index 120 days of storage at ambient conditions of Pelotas RS. It was used a completely randomized design with four replications. The conclusions were: treatment of cotton seeds with phytin increased the percentage of germination, first count, speed index, accelerated aging, root length, emergency field before and after the storage period. The treatment of cotton seeds with ZnSO4 in cotton seed does not affect the accumulation of dry matter of shoots, however, decreases the accumulation of dry roots. For boron micronutrient seed treatment helps improve germination, first count of germination, germination velocity index, length of air accelerated aging before and after storage.