控释肥料性质及其对烟草生长影响的研究

Property of controlled release fertilizer and its effect on the growth of tobacco

该文以自然资源"桐油"为包膜材料(从油桐果实中提取),生产包膜肥料,采用盆栽试验,对控释尿素养分释放动态进行研究。养分的测定采用"质量法"进行。结果表明:在红壤中,以桐油为原料的控释尿素初期溶出率为12.6%,比普通尿素初期溶出率下降69.5%,并且较好地满足烟草生长对养分需求特点。施包膜尿素比施普通尿素烟草叶片干物质产量增加5.5g/株。

The tung oil of the nature resources extracted from the fruit of tree used as controlled material for producing the controlled-released-fertilizer was studied. The soil incubation experiment was carried out. The nutrient release of controlled released carbamide was studied. The 'weight method' was adopted to measure the fertilizer nutrient. The result showed that the preliminary solubility rate of controlled release carbamide is 12.6% in the soil, which decreased by 69.5% compared with the preliminary solubility rate of nitrogen. The controlled release urea meets the nutrient demands for the growth of tobacco. In comparison with urea and controlled release urea, the dry weight of tobacco plant leaf increased by 5.5 g per plant more using the controlled release carbamide than that using common urea.