不同氮素水平对烟台地黄瓜生长、产量和土壤有效氮的影响

Effects of Different Nitrogen Levels on Growth and Yield of Yantai Ground Cucumber and Soil Available Nitrogen

通过田间小区试验,研究了不同氮肥施用量对烟台地黄瓜生长、产量、经济效益及对土壤有效氮的影响。结果表明:适量的施用氮肥对黄瓜的茎粗、节间有明显的促进作用;黄瓜叶片叶绿素含量随着氮肥施用量的增加而增加,二者呈显著正相关,相关系数为0.9744;随着施肥量的增加,黄瓜的产量和经济效益逐渐增加,处理3达到最高,即氮肥(纯N)施用量为460.7 kg/hm2时,产量最高,为77 333.3 kg/hm2,经济效益也最大,为301 318.3元/hm2;随着氮素施用量的增加土壤有效氮的含量增加,二者呈显著正相关,相关系数为0.9580。

The plot experiment was conducted in field to study the effects of different nitrogen application rates on growth, yield, economic benefit and soil available nitrogen of Yantai Ground cucumber. The results showed that appropriate nitrogen application rate had significant positive role in stem diameter and internode length of cucumber. The chlorophyll content of cucumber leaves increased significantly with the increase of ni- trogen application rate, and their correlation coefficient was 0. 9744. Yield and economic benefit of cucumber increased gradually with the increase of N application rate and those of the 3rd treatment was the highest. That was to say, the hightest yield was 77 333 kg/hm2 and the hightest economic benefit was 301 318.3 yuan/hm2 under the treatment with nitrogen application rate as 460.7 kg/hm2. The soil available nitrogen content in- creased with the increase of nitrogen application rate, and their sighnificantly positive correlation coefficient was 0. 9580.