【摘要】 通过对洛阳郊区不同肥力的保护地蔬菜进行取样分析 ,研究了番茄、黄瓜的营养特性及保护地的平衡施肥问题。结果表明 ,保护地番茄黄瓜前期吸肥量较少 ,中后期吸肥速度较快 ,吸收养分最多。磷素主要在生长前中期吸收 ,氮钾肥主要在中、后期吸收。每生产 1 0 0 0 kg的番茄平均需要吸收 3.0 7kg N、0 .87kg P2 O5和 4.30 kg K2 O,吸收比例为 1∶ 0 .2 8∶ 1 .40。每生产 1 0 0 0 kg黄瓜需要 2 .46kg N、1 .2 3kg P2 O5和 3.56kg K2 O,吸收比例为 1∶ 0 .50∶ 1 .45更多还原

【Abstract】 Analysis indicated that nutritive absorption of tomato and cucumber in the earlier growing period is lower than that in the middle and later period in protective field. In the earlier growing period, absorption centralized in phosphorus , in the middle and later growing period in potassium and nitrogen. On the average ,tomato absorbed N3.07 kg. K 2O 4.30kg and P 2O 5 0.87kg per 1000kg yield ,rate of N∶P 2O 5∶K 2O is 1∶0.28∶1.40; cucumber absorbed N 2.46kg,K 2O 3.56kg and P 2O 5 1.23kg per 1000kg yield, rate of N∶P 2O 5∶K 2O is 1∶0.50∶1.45.更多还原