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本文研究了四个氮钾处理对马铃薯“金冠”品种植株生长、块茎产量与品质和氮磷钾吸收的影响.结果表明:在钾水平相同时,高氮比低氮抑制植株生长与降低块茎产量,尤其是在高钾条件下增氮的减产效应更明显.低氮时增钾明显地促进植株生长与提高块茎产量,而高氮时增钾则抑制植株生长与降低块茎产量.处理中,以低氮高钾(N_4K_6)处理的块茎产量、品质与商品率最佳.氮钾互作明显地影响植株对氮、钾吸收,而对磷吸收影响不大.植株的氮、磷含量与块茎产量无显著相关,植株的钾含量与块茎产量呈显著正相关.植株体内N/K比值与块茎产量呈显著负相关。
The effects of four nitrogen and potassium treatments on the plant growth, tuber yield and quality, and the absorption of nitrogen, phosphorus and potassium in potato varieties “Golden Delicious” were studied.The results showed that under the same potassium level, high nitrogen and low nitrogen could inhibit plant growth and reduce tuber yield , Especially in the high-potassium conditions, the yield-reducing effect of increasing nitrogen was more obvious.The increase of potassium in low nitrogen promoted plant growth and tuber yield obviously, while the increase of potassium in high nitrogen inhibited plant growth and reduced tuber yield The yield, quality and commodity rate of tubers were the best under low N and K (N_4K_6) treatment.Nitrogen and potassium interaction significantly affected the plant absorption of nitrogen and potassium, but had little effect on phosphorus uptake.The plant nitrogen and phosphorus content and tuber yield There was a significant positive correlation between the K content and the tuber yield in plants, but there was a significant negative correlation between N / K ratio and tuber yield.