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首页> 外文会议>International Nitrogen Conference; 20041012-16; Nanjing(CN) >EFFECTS OF CONTROLLED-RELEASE NITROGEN FERTILIZERS ON YIELD AND QUALITY OF CHINESE CABBAGE (BRASSICA CAMPESTRIS L. SSP. PEKINENSIS)
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EFFECTS OF CONTROLLED-RELEASE NITROGEN FERTILIZERS ON YIELD AND QUALITY OF CHINESE CABBAGE (BRASSICA CAMPESTRIS L. SSP. PEKINENSIS)

机译：控释氮肥对白菜产量和品质的影响（小白菜）

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摘要

The effects of different controlled-release nitrogen fertilizers (CRNFs) supply on yield and quality of Chinese cabbage were studied in field experiment. Relationship between nitrogen release from CRNFs and nitrogen uptake by Chinese cabbage, and the characteristics of fertilizer coat were also discussed. The results showed that the yield of Chinese cabbage was significantly increased by 8.2%-16.8% with CRNFs application, compared to the urea supply. Vc content in the head leaves at harvest stage was 1.80mg/kg at average with CRNFs application, 24.8% higher than that of urea treatment. NO_3~--N contents were significantly decreased by CRNFs treatments, which were 14.3%-39.9% lower in rosette leaves at rosette stage and 12.1%-21.4%in head leaves at harvest stage, compared to urea treatment. The yields, NO_3~--N content and Vc content of Chinese cabbage leaf were almost changeless when CRNFs were half supplied. It was confirmed that nitrogen was released slowly and continuously from the inner part of CRNF granules. When CRNFs were applied at early stage, nitrogen was still supplied at medium and later stage for Chinese cabbage. The characteristics of nitrogen release of CRNF were apparently determined by thickness of granule coat, number and diameter of pores on coat surface.
机译：通过田间试验研究了不同控释氮肥供应对白菜产量和品质的影响。还讨论了CRNFs释放的氮与大白菜吸收氮的关系，以及化肥的特性。结果表明，与尿素供应相比，施用CRNFs的白菜产量显着提高了8.2％-16.8％。施用CRNFs的收获期叶片的Vc含量平均为1.80mg / kg，比尿素处理高24.8％。与尿素处理相比，CRNFs处理显着降低了NO_3-〜N含量，在莲座叶期莲座叶中NO_3〜--N含量降低，在收获期叶顶叶中NO_3〜--N含量降低12.1％-21.4％。一半供应CRNF时，大白菜叶片的产量，NO_3-〜N含量和Vc含量几乎没有变化。确认氮从CRNF颗粒的内部缓慢且连续地释放。早期使用CRNFs时，大白菜在中后期仍需供应氮。 CRNF的氮释放特征显然是由颗粒包衣的厚度，包衣表面的孔的数量和直径决定的。

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