| In order to explore the characteristics of dry matter accumulation and N and P nutrition of high yield(>9 000 kg·hm-2) drip irrigation spring wheat in northern Xinjiang, a spring wheat variety Xinchun 44 was used as experimental material, and five phosphorus application（P2O5） treatments were set up:0 kg·hm-2(P0), 30 kg·hm-2(P1), 90 kg·hm-2(P2), 150 kg ·hm-2(P3) and 210 kg·hm-2(P4). The different yield levels of spring wheat in northern Xinjiang were established, and characteristics of dry matter accumulation, transport and utilization, nitrogen and phosphorus nutrition characteristics of spring wheat with different yields were analyzed. The results showed that the appropriate amount of phosphorus fertilizer can promote the accumulation, transport and distribution of dry matter, nitrogen and phosphorus nutrition characteristics and yield of spring wheat. When the phosphorus application rate increased from 0 kg·hm-2 to 210 kg·hm-2, the yield increased and then decreased, and reached the high yield level at 150 and 210 kg P2O5·hm-2, ranging from 9 401.59 and 9 080.63 kg·hm-2, respectively. Among the five phosphorus application treatments, the accumulation, transport and distribution of dry matter and the accumulation, transport and distribution of nitrogen and phosphorus were the best at 150 kg·hm-2phosphorus application. Under the high yield levels of 150 and 210 kg·hm-2, spring wheat had higher nitrogen production efficiency and phosphorus production efficiency, with an average of 29.98 and 94.80 kg·kg-1. Therefore, under the drip irrigation planting mode of spring wheat in northern Xinjiang, the appropriate application amount of phosphorus fertilizer can increase the yield of spring wheat, so that high yield spring wheat has a higher level of dry matter accumulation and transport capacity, nutrient absorption and utilization capacity, under the experimental conditions. The application amount of 150 kg·hm-2 is the best dosage, taking the yield and nutrient utilization of spring wheat into account. |
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