氮肥施用量对喀斯特山区莴笋产量及经济效益的影响

为优化莴笋氮肥用量,为莴笋高产栽培提供参考,通过大田试验研究不同氮肥施用量对喀斯特山区莴笋产量及经济效益的影响。试验结果表明,在本试验条件下,无氮区(处理1)莴笋产量最低,仅991.7 kg/667 m2,随着氮肥用量的增加,莴笋产量显著提高,70%优化氮区(处理2)产量1 245.9 kg/667 m2,优化氮区(处理3)产量1 408.4 kg/667 m2,130%过量氮肥水平(处理4)产量最高,为1 579.2 kg/667 m2,且处理4纯收入、投入产出比、氮肥利用率均最高。

Effects of Different Nitrogen Fertilizer Dosages on Yield and Economic Benefit of Lecture in Karst Mountainous Area

In order to optimize nitrogen fertilizer dosage and provide references for high-yield cultivation of lecture, we studied the different nitrogen fertilizer dosages on the yield and economical benefit of lecture in Karst mountainous area in fields. The results showed that, the treatment 1 （without nitrogen fertilizer） had lowest yield of 991.7 kg/667 m^2. The lecture yield was increased as the amount of nitrogen fertilizer was increased, and the yields of treatment 2 （with 70% optimized amount of nitrogen fertilizer）, treatment 3 （with optimized amount of nitrogen fertilizer） and treatment 4 （with 130% optimized amount of nitrogen fertilizer） were 1 245.9, 1 408.4 and 1 579.2 kg/667 m^2, in additon, the treatment 4 had highest yield, net income, output-input ratio and utilization rate of nitrogen fertilizer.