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本文介绍了用盆栽方法研究茄子干物质积累与养分吸收的规律。结果表明:茄子全生育期干物质积累与养分吸收均按 Logistic 函数变化,随着施肥量增加,曲线陡度加大,拐点后移。干物质迅速积累与养分旺盛吸收的时间出现在株龄76～144天左右。单株生产1515g 果实需要吸收纯氮6.84 g,纯磷1.97 g,纯钾5.03g,其氮、磷、钾比为1.36:0.39:1.00。单株生产量最高条件下全生育期叶片的最佳营养指标为氮3.87～5.77%,磷0.85～0.11%,钾2.24～3.89%。
This article introduced the potted method to study the law of dry matter accumulation and nutrient absorption of eggplant. The results showed that the dry matter accumulation and nutrient uptake of eggplant during the whole growth period all changed according to the Logistic function. With the increase of fertilizer amount, the steepness of the curve increased and the inflection point shifted backward. The rapid accumulation of dry matter and nutrient absorption time appears in the age of about 76 to 144 days. The yield of 1515g fruits per plant needs to absorb 6.84 g of pure nitrogen, 1.97 g of pure phosphorus and 5.03 g of pure potassium, with nitrogen, phosphorus and potassium ratios of 1.36: 0.39: 1.00. Under the highest single plant yield, the best nutrition indexes of the whole growth period were 3.87-5.77% of nitrogen, 0.85-0.11% of phosphorus and 2.24-3.89% of potassium.