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In order to explore the most efficient fertilization method of slow-release fertilizer in naked barley, Suluomai 2 was used as the experimental material, polymer coated urea (PCU) and urea (U) were selected as the nitrogen resources. Eight fertilization modes were designed. They were 100% PCU as basic fertilizer (T1), 75% PCU and 25% U as basic fertilizer (T2), 50% PCU and 50% U as basic fertilizer (T3), 25% PCU and 75% U as basic fertilizer (T4), 100% U as basic fertilizer (T5), 60% PCU as basic fertilizer and 40% PCU as re-greening fertilizer (T6) and 0 N (CK0), respectively, and 100% U (basal∶seedling∶jointing∶booting as 50∶10∶25∶15) was the control (CK). The effects of different fertilization models on growth period, yield and its components, nitrogen fertilizer agronomic efficiency and quality of naked barley were studied. The results showed that the growth period of the T3, T4, T5 and T6 models was significantly shorter than that of CK. The yield and nitrogen fertilizer agronomic efficiency of the T6 model were the highest, which was increased by 2.35% and 2.12% than that of CK, respectively, mainly due to the increase of panicle number and 1 000-grain weight. The yield and nitrogen fertilizer agronomic efficiency of the T1, T2, T3, T4 and T5models which used all nitrogen as basic fertilizer were lower than those of CK. The T3 model had the lowest amylose content, but the highest amylopectin content and soluble dietary fiber content, which was decreased by 34.11%, but increased by 37.60% and 22.21% than those of CK, respectively. Thus, the T3 model had the best quality. The correlation analysis of 10 quantitative traits showed that yield was significantly positively correlated with panicle number (P<0.01), spikelet number per panicle (P<0.01), and crude protein content (P<0.05), which indicated that panicle number, spikelet number per panicle, and crude protein content can be used as the main target traits for high yield naked barley varieties breeding. Taken together, the T6 model (60% PCU as basic fertilizer, 40% PCU as re-greening fertilizer) was recommended, as it was conducive to achieving the purpose of increasing production and nitrogen fertilizer agronomic efficiency; while the T3 model (50% PCU and 50% U as basic fertilizer) would be a better choice to achieve the naked barley with better quality. These two models could be recommended as fertilization patterns for naked barley.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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