测土配方施肥对卷心菜增产效果研究

为探索测土配方施肥对卷心菜增产效果,研究了氮、磷、钾配比与卷心菜成产的作用关系,确定卷心菜生产最佳施肥方案。结果表明:N_2P_2K_2+沼液增产最显著,较无肥区增产57.79%。氮肥通过影响植株的发育而影响卷心菜产量,是影响作物产量的关键因素,而磷、钾的影响较少。增产率以氮肥最高(28.25%),钾肥次之(17.11%),磷肥第三(15.44%);产投比以氮肥最高(8.32),磷肥次之(8.08),钾肥第三(5.56);产出率以钾肥最高(50.92),氮肥次之(47.59),磷肥第三(45.96);肥料利用率趋势同产出率;从相对经济产量来看,以磷肥最高,钾肥次之,氮肥最低,这也进一步说明缺失氮肥将阻碍产量增加,而磷、钾肥对产量影响相对较小。沼液在处理2中兼作基肥和追肥,减少了化肥用量,提升了卷心菜品质。在扣除肥料成本后,处理2的经济效益最显著。

Effect of soil testing and fertilizing on common head cabbage yield

The relations of N,P and K fertilizer rates to common head cabbage yield were studied through field experiments,and the optimal fertilizer rates were determined.The results showed that N_2P_2K_2+biogas slurry had the best effect on production and made the yield increase by 57.79%over no fertilization.N fertilizer was a key factor influencing the yield through affecting the development of plants,while P and K fertilizers influenced the yield less.The descending order in yield-increasing effect was N(28.25%),...