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In order to investigate the interaction effect of nitrogen (N) and sulfur (S) fertilizer on dry matter accumulation and grain yield of winter wheat in eastern Hebei Province, a winter wheat Shinong 952 was used as material. A split plot design was adopted, with the N application as main plot: 0 kg·hm-2 (N0), 180 kg·hm-2 (N1), 240 kg·hm-2 (N2) and 300 kg·hm-2 (N3), and S application as the sub-plot:82.5 kg·hm-2 (S1), 112.5 kg·hm-2 (S2), 142.5 kg·hm-2 (S3) and 172.5 kg·hm-2 (S4). The differences of chlorophyll relative content (SPAD), leaf area index (LAI), dry matter and nitrogen translocation, and grain yield of winter wheat under different treatments were analyzed. The results showed that N and S application significantly affected LAI and flag leaf SPAD of winter wheat. The SPAD value of N1S2 treatment was the highest at anthesis, which was significantly higher than the other treatments except N2S2 and N3S2. The N and S application had positive effects on the translocation of dry matter and nitrogen restored before anthesis, and the accumulation of dry matter and nitrogen after anthesis, the interaction between N and S nutrition also was significant. Wheat grain yield ranged from 7 364.71 kg·hm-2 to 10 078.20 kg·hm-2 under different treatments, and increased significantly with the increase of N application amount. The grain yield of N2S3 treatment was significantly higher than the treatments under N0 and N1 levels, but was no significantly different from the other treatments under N2 and N3 levels. S application had no significant effect on grain yield and 1 000-grain weight of wheat. Overall, the application of nitrogen-sulfur fertilizer with right amounts is conducive to higher SPAD values and LAI in the flag leaves of winter wheat, can enhance the photosynthetic capacity of the leaves, promote post-anthesis dry matter accumulation and pre-anthesis nitrogen translocation, and ultimately increase winter wheat yield. 240 kg N·hm-2 and 82.5 kg S·hm-2 were the most suitable N and S fertilizer combinations for saving fertilizer and increasing efficiency in winter wheat production.
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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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