[Effects of phosphorus application rates and depths on P utilization and loss risk in a maize-soybean intercropping system]. / æ½ç£·éä¸æ½ç£·æ·±åº¦å¯¹çç±³-大è±å¥ä½ç³»ç»ç£·ç´ å©ç¨çå磷æµå¤±é£é©çå½±å.
Ying Yong Sheng Tai Xue Bao
; 29(4): 1205-1214, 2018 Apr.
Article
en Zh
| MEDLINE
| ID: mdl-29726230
ABSTRACT
In order to explore the advantage of intercropping on phosphorus (P) efficient utilization and the reduction of soil P loss, a field experiment in a maize-soybean intercropping system, which included three P application (P2O5) rates (CP 168 kg·hm-2; RP1 135 kg·hm-2; RP2 101 kg·hm-2) and three P application depths (D1 applied in 5 cm depth; D2 applied in 15 cm depth; D3 1/2 of P fertilizer applied in 5 cm depth and another 1/2 in 15 cm depth) was carried out to analyze the effects of P application rates and depth on crop aboveground biomass, grain yield, crop P uptake, soil total and available P contents, and soil P adsorption-desorption characteristics. Compared with control treatment, the aboveground biomass, grain yield, crop P uptake, soil total P, and available P content were increased significantly by P application, regardless of P rate and application depth. Under the same application depth, RP1 had similar grain yield but higher crop P uptake compared with CP, and thus higher P apparent utilization efficiency. Under the same P application rate, the application depth of D2 had the highest crop aboveground biomass, grain yield, P uptake, soil total P, and available P. According to the characteristic of soil P adsorption-desorption, the treatment with the rate of RP1 and the depth of D2 had the strongest soil P retention capacity, which had advantage in alleviating P loss. These results suggested that reducing application rate but increasing application depth of P fertilizer could improve P use efficiency and reduce soil P loss without sacrifice in crop production in maize-soybean relay intercropping system.
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Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Glycine max
/
Zea mays
/
Fertilizantes
Tipo de estudio:
Etiology_studies
/
Risk_factors_studies
Idioma:
Zh
Revista:
Ying Yong Sheng Tai Xue Bao
Año:
2018
Tipo del documento:
Article
País de afiliación:
China