木薯“3414”肥效试验研究

2008年在防城港市防城区华石镇黄江村开展了木薯＂3414＂肥效试验,探讨在沙页岩残积物发育成的赤沙土上种植木薯的施肥效应,以及不同氮磷钾施用水平对木薯产量的影响,以获得当地的最佳施肥量。结果表明：施用不同配比的氮、磷、钾肥对木薯产量具有不同程度的影响,3个施肥因子对木薯产量的影响依次为：N〉K〉P;在当地土壤肥力条件下,氮、磷、钾最佳施用量分别为94.50、31.35、105.45kg/ha,木薯产量为31859.70kg/ha,氮、磷、钾施用比例为1.00∶0.33∶1.12。

Effect of "3414" fertilizer design on cassava

The ＂3414＂ fertilizer test in cassava（GR 911） was conducted in 2008 to investigate the effects of fertilizer on cassava planted in red sandy soil derived from arenaceous shale.Further,the effect of different application rate of N,P and K on yield of cassava was studied to get optimum fertilizer application rates for this crop in Huangjiang Villege,Huashi Town,Fangchenggang City.The application rates of N,P and K were as follows： N（0,82.5,165.0,247.5kg / ha）,P（0,30.0,60.0,90.0 kg / ha）,K（0,60.0,120.0,180.0 kg / ha）.The results showed that the different combina-tions of N,P,K fertilizer had different effects on the yield of cassava with efficiency in order NKP.Under local soil fer-tility conditions,the optimum fertilizer application of N,P and K was found to be 94.50,31.35 and 105.45 kg / ha,re-spectively,the yield of cassava was 31859.70 kg / ha,and the application ratio of N,P,K was 1.00∶0.33∶1.12.