| Effects of phosphorus rate on maize yield, soil available phosphorus and phosphorus use efficiency by double-bed and furrow-sowing with full plastic film mulching in semi-arid field |
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| DOI：10.7606/j.issn.1000-7601.2016.05.10 |
| Key Words: accumulation of soil available phosphorus phosphorus use efficiency yield double-bed and furrow-sowing with full plastic film mulching maize |
| Author Name | Affiliation | | TANG Wen-xue | Institute of Soil, Fertilizer and Water-saving Agriculture, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | MA Zhong-ming | Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | WANG Jing-cai | Dingxi Academy of Agricultural Sciences, Dingxi, Gansu 741100, China | | LU Ying | Sichuan Agricultural University, Ya’an, Sichuan 625014, China |
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| Abstract: |
| To focus on the issues of unscientific fertilizer application and lower phosphorus use efficiency by double-bed and furrow-sowing with full plastic film mulching on the semi-arid Loess Plateau, the effects of phosphorus rate (0 kg·hm-2(CK),120 kg·hm-2(P1),240 kg·hm-2(P2) and 480 kg·hm-2(P3)) on maize yield, soil available phosphorus and phosphorus use efficiency were studied from 2011 to 2013 by using randomized block design. The results showed that yield was significantly increased by application of phosphorus, but went decreased by excessive input of phosphorus. Effects on yield followed the order of P1＞P2＞P3＞CK. The accumulation of soil available phosphorus was elevated with the increase of phosphorus at the same growth stage, the increment of soil available phosphorus accumulation by phosphorus treatments was higher than that by no phosphorus treatments. Compared with the basic phosphorus before sowing in 2011, the accumulation of phosphorus in 2013 after harvesting was increased by 53.6%～208.5%. The phosphorus use efficiency became decreased as phosphorus increased. The quarter and accumulative phosphorus use efficiency reached maximums of 15.51% and 13.91%, respectively. Taking comprehensive considerations of maize yield, phosphorus use efficiency and the ecological environment security, the suitable phosphorus input (P2O5) was 120 kg·hm-2. |
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