摘要
淋雨使土壤速效氮钾含量明显下降．氮、钾、磷肥的淋失率分别为３６．０９％、２０．０１％、１．１６％，淋雨使烤烟氮、钾肥利用率分别下降３１．０９％、２０．０３％．而对磷肥利用率影响不大．不同氮磷钾配比的处理组合，烟株的生长、产量、质量具有明显的差异，在参试的九个处理组合中，以每公顷施纯Ｎ１３５ｋｇ：Ｐ２Ｏ５：Ｋ２Ｏ＝１：１：２为最优组合，上中等烟比例比其它处理组合提高４．０２％－１０．６５％，每公顷产值增加４８－９９０元．
Content of available N and K in the soil were notably reduced by rain-drenched. The rain-washing ratio of N, K, P fertilizers was 36.09% , 20.01%, 1.16% , respectively. The ratio of N, K fertilizcrs absorbedly tobacco in the condition of rainning droped 31.09% and 20. 03% , respectively. The ratio of P fertilizer absorbed by tobacco was not influcnced by rainning. Tobacco growth, yield, quality in varied mixedand amount of NPK fertilizers were markly difference. The best treatment combination among nine treatment combinations of the experiment was that the ratio of N application was 135 kg per hm2 and N: P2O5 : K2O=1:1 : 2, which the ratio of high and middle tobacco quality was more 4.02%-10.65% and output value was more 48-990 yuan per hm2than other treatment combinations.
出处
《福建农业大学学报》
CSCD
1994年第3期315-318,共4页
Journal of Fujian Agricultural University
关键词
降雨
烤烟
养分
淋失率
氮
磷
钾
rainning
tobacco
the rain-washing ratio of nutrients
effect of NPK fertilizers mixed application
