全膜覆盖条件下缓释氮肥对马铃薯产量、品质的影响

Effcets of slow-released nitrogen fertilizer on yield and quality of potatoes in plastic film mulching contions

为了指导青海省山旱区全膜覆盖马铃薯合理施肥,以下寨65为试验材料,分别设置对照(CK)、推荐施肥不施钾肥〔N(N50)P〕、推荐施肥不施磷肥〔N(N50)K〕、推荐施肥不施氮肥(PK)、推荐施肥〔N(N50)PK〕、推荐施肥〔N(N80)PK〕、推荐施肥(NPK)及当地习惯施肥(FP)等8个不同施肥处理,研究不同释放期缓释尿素和普通尿素及不同氮磷钾肥配合施用对马铃薯产量及品质的影响。结果表明,缓释尿素与等养分的普通尿素相比,马铃薯增产率为10.6%、17.4%,表现出明显的增产趋势,淀粉含量提高27%,还原糖含量降低52%,表明施用缓释氮肥有助于提高马铃薯产量及品质。

The theoretic bas is and the technical guidance of the reasonable fertilizationfor potato were provided throughthe researchonthe effect of differen nitrogen,phosphorus and potassium fertilizations on biomass accumulation and yield of potato.on plastic film mulching contions in the dry mountain.The effect of 8 fertilizations（TreatmentOne： N（N50）,P2O5;TreatmentTwo： N（N50）,K2O;Treatment Three： P2O5,K2O;Treatment FourN（N50） P2O5,K2O Treatment Five N（N80）P2O5,K2O;Treatment six N P2O5,K2O;Treatment seven N P2O5 andCK） on the biomass accumulation and yield formation of potato-xiazhai65 was expermiented.The results show that compared common urea nutrient with slow-release urea,the rate increase 10.6%,17.4%,which showing significant increase trend.the different periods of the release of slow-release nitrogen fertilizer increased in potato starch 27% than ordinary urea,reducing sugar content of potato was reduced by 52%,the application of slow-release nitrogen fertilizer helps to improve the yield and quality of potato.