【摘要】 采用"3414"二次回归最优设计和田间小区试验方法,研究了氮、磷、钾肥对丹参养分吸收、根性状及产量的影响。结果表明,丹参在生长30,30~90,90~120 d对N吸收量占全生育期吸收总量的百分比为:5.2%~14.8%、61.8%~93.4%、0.6%~28.7%;P2O5的各时期吸收百分比为:2.6%~7.8%、37%~63.7%、28.5%~59%;定植生长30~90 d时丹参对K素的吸收量占全生育总吸收量的86.3%~95.3%。形成100 kg丹参产量需N量为1.89~2.26kg,需要P2O5的量为0.57~0.69 kg,需要K2O的量为1.35~2.14 kg。氮肥对丹参根长影响最大,磷、钾肥次之;磷、钾肥对根直径影响比较大;钾肥对根数的影响最大。根据模型得出最佳施肥方案:N248.00 kg/hm2、P2O5127.67 kg/hm2、K2O155.33 kg/hm2,根产量可达5259.58 kg/hm2。更多还原

【Abstract】 The article discussed the effects N,P and K fertilizer on the Salvia miltiorrhiza of yields,root characters and nutrient content by using the ″3414″ mathematic model of balance fertilization.The result indicated that the absorption percentage of N were 5.2%-14.8%,61.8%-93.4%,0.6%-28.7%,when the Salvia miltiorrhiza had grown for 30,30-90,90120 d respectively.The absorption percentage of P were 2.6%-7.8%,37%-63.7%,28.5-59% respectively.And the absorption percentage of Kwere 86.3%-95.3%,when the Salvia miltiorrhiza had grown for 30-90 d.The N,P2O5 and K2O amount what 100 kg salvia miltiorrhiza output has need were 1.89-2.26,0.57-0.69,1.35-2.14 kg respectively.At the same time,according to the mathematical model,the preferred fertilization plan was acquired,the N,P2O5 and K2O were respective 248.00,127.67,155.33 kg/ha.更多还原