| Effects of fertilization on yield and fertilization use efficiency of winter wheat in arid zone in Loess Plateau of eastern Gansu province |
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| DOI：10.7606/j.issn.1000-7601.2017.02.23 |
| Key Words: winter wheat fertilizer fertilizer utilization yield |
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| Abstract: |
| In order to provide technical basis for the rational use of chemical fertilizers, field randomized block experiment was conducted to investigate the effects of prescription fertilization and conventional fertilization on wheat production and fertilizer use efficiency through the formulation N 187.5, P 90.0, K 60.0; N 187.59, P 90.0; N 187.5, K 60.0; P 90.0, K 60.0 kg·hm-2 and conventional P 88.5, K 88.5, N 157.5; P 88.5, N 157.5; N 157.5, K 88.5; P 88.5, K 88.5 kg·hm-2. The results showed that under plastic film mulching cultivation conditions, compared with conventional fertilization, prescription fertilization increased yield by 537.75 kg·hm-2(7.31%) in average. Fertilizer use efficiency increased by 12.51% (2.4% nitrogen, 2.17% phosphate, 7.94% potash). With the poor fertility of the zone in Loess Plateau of eastern Gansu, plastic film mulching cultivation, the utilization rate of nitrogen, phosphate, potash in prescription fertilization was 37.4%, 24.1%, 43.0% respectively. The utilization rate of nitrogen, phosphate, potash in conventional fertilization was 35.0%, 21.9%, and 35.1% respectively. Therefore, prescription fertilization improved yield and fertilizer use efficiency effectively. |
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