论文部分内容阅读
在淡黑钙土上,向日葵吸收土壤氮、钾较多,而磷相对较少。吸收肥料氮多,磷少、钾居中。施肥对向日葵吸收土壤养分都有激发效应。向日葵吸收肥料养分的高峰期为出苗后60—77天。施用氮、磷、钾化肥后,向日葵籽实含油率均高于无肥处理,而蛋白质含量均低于无肥处理,但单位脂肪及蛋白质产量均提高。
In the light chernozem, sunflower to absorb soil nitrogen, potassium more, and phosphorus is relatively small. Absorption of nitrogen fertilizer, phosphorus less, potassium center. Fertilization of sunflower have stimulated soil nutrient absorption. Sunflower absorb nutrients peak season of 60-77 days after emergence. After applying nitrogen, phosphorus and potassium fertilizers, the oil content of sunflower seed was higher than that of no fertilizer treatment, while the protein content was lower than that of no fertilizer treatment, but the unit fat and protein yield increased.