新型包膜缓释肥对大白菜生理特性、产量及品质的影响

以粉煤灰和有机黏结剂为包膜材料,对普通复合肥料(N-P2O5-K2O:15-15-15)进行包膜,制备了N-P2O5-K2O分别为14.25-14.25-14.25、13.5-13.5-13.5和12.75-12.75-12.75的3种包膜缓释肥料。通过田间试验,研究了包膜缓释肥料对大白菜生理特性、产量以及品质的影响。结果表明,在施肥水平相同的情况下,与普通复合肥相比,3种包膜缓释肥料可以提高大白菜生长后期叶片叶绿素含量、净光合速率、蒸腾速率和气孔导度,有效地降低叶片气孔限制值Ls;3种粉煤灰包膜复合肥处理能有效地改善大白菜单株参数,单株结球质量增加0.10~0.33 kg,产量提高9.72%~33.1%;同时,施用粉煤灰包膜缓释肥可以显著降低大白菜功能叶的NO3--N含量,也一定程度上降低了有机酸含量,提高了收获期大白菜球叶中可溶性糖含量、糖酸比以及Vc含量。

Effect of homemade coated release fertilizers on physiological characteristics,yield and quality of Chinese cabbage

Three controlled release fertilizers with N-P2O5-K2O ratio being 14.25-14.25-14.25,13.5-13.5-13.5 and 12.75-12.75-12.75,separately were prepared out of a common compound fertilizer(N-P2O5-K2O:15-15-15) by coating it with fly ash and organic agglomerant.A field experiment was conducted to study effects of the coated controlled release fertilizers on physiological characteristics,yield and quality of the Chinese cabbage growing in the field.Results show that the fertilizers increased chlorophyll content,photo...