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In order to understand the effects of different types of fertilizers on the photosynthetic characteristics and yield of wheat at the jointing stage, the effects of three different types of fertilizers: F1 (ternary compound fertilizer, N∶P2O5∶K2O=15∶15∶15), F2 (wheat compound fertilizer, N∶P2O5∶K2O=26∶10∶9), F3 (urea) and no topdressing (CK) on wheat photosynthetic indices, dry matter accumulation and yield were studied under the same type and amount of base fertilizer application at the jointing stage. The results showed that the application of F3 at the jointing stage increased the leaf area index at the middle and early stages of wheat growth compared with F2, and the F2 treatment was conducive to maintaining the higher leaf area index at the filling stage. The chlorophyll content of F2treatment was significantly higher than that of F1 treatment (P<0.05) at the flowering stage and filling stage, and there was no significant difference when compared with F3 treatment. The photosynthetic rate of F2 was the highest. compared to F3, F2significantly increased canopy photosynthetically active radiation at flowering and middle of filling stages by 4.74%, 4.18% and 5.83%, 5.09%, respectively in Suixi and Yingshang experimental sites. F1 can increase the photosynthetic rate compared with F3, but reduce the photosynthetically available radiation in the canopy. The grain filling rate ranked as F2>F1>F3>CK, and the grain filling rate of CK was significantly lower than that of the treatments. The dry matter accumulation of the F3 group was higher than that of the F2 treatment at the booting and flowering stages, while the dry matter accumulation of the F2 group was higher than that of the F3 treatment at the maturity stage. The yield of topdressing treatments ranked as F2>F1>F3, with significant differences. Compared to F1, F2 increased yield by 7.26% and 8.13%, respectively in Suixi and Yingshang experimental sites. All the findings demonstrated that although topdressing with the same weight of urea increased the leaf area index, chlorophyll content and population dry matter accumulation of wheat at early growth stage, topdressing with specialized compound fertilizer had more advantages in improving photosynthetic indices, grain filling rate and population dry matter accumulation at the middle and later growth stages of wheat. Topdressing with specialized compound fertilizer increased yield when compared to ternary compound fertilizer and urea.
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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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