论文部分内容阅读
荔枝除需要氮肥和适量磷肥外,需要特别高量的钾肥。从荔枝的果实分析可以看出,氮占果实干重的0.96%、磷占1.16%、钾占3.11%。根据需肥特点进行合理施肥。在各施肥期中,采收前后的采果肥最为重要。采果肥在树冠下开条状沟或环形沟内每株施用优质有机肥150-250千克、硫酸铵2-3千克、过磷酸钙3-5千克、硫酸钾、0.25-0.5千克。对于产量高的荔枝树,老弱树和迟熟品种采果肥应在采收前半个月进行。第二次施肥在开花前20天左右进行。以速效氮肥为主,每株施用人粪尿50-100 千克或尿素1-1.5千克、硫酸钾0.3-0.5千克、过磷酸钙0.5千克,撒施后耕翻或开放射状浅沟施,施肥后结合灌水。
In addition to the need for nitrogen and fertilizer litchi phosphorus, the need for a special high amount of potassium. As can be seen from the fruit analysis of litchi, nitrogen accounted for 0.96% of fruit dry weight, phosphorus accounted for 1.16%, potassium accounted for 3.11%. Fertilizer according to the characteristics of the need for reasonable fertilization. In each fertilization period, before and after harvesting the most important fruit picking. Picking fruit fertilizer in the canopy under the open ditch or annular groove per plant application of high quality organic fertilizer 150-250 kg, 2-3 kg of ammonium sulfate, superphosphate 3-5 kg, potassium sulfate, 0.25-0.5 kg. For the high yield of litchi trees, old and weak trees and late maturing varieties of fruit should be harvested in the first half of harvest. The second fertilization 20 days before flowering. To quick-acting nitrogen fertilizer-based, the application of manure 50-100 kg per plant or urea 1-1.5 kg, 0.3-0.5 kg of potassium sulfate, 0.5 kg of calcium superphosphate, Combined with irrigation.