| Effects of phosphorus placement depth on dry matter and phosphorus accumulation and transfer of spring maize |
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| DOI：10.7606/j.issn.1000-7601.2016.05.16 |
| Key Words: spring maize dry matter phosphorus content accumulation and translocation |
| Author Name | Affiliation | | DUAN Gang-qiang | Agronomy Department of Inner Mongolia University for Nationalities, Tongliao, Inner Mongolia 028042, China | | YANG Heng-shan | Agronomy Department of Inner Mongolia University for Nationalities, Tongliao, Inner Mongolia 028042, China | | ZHANG Rui-fu | Agronomy Department of Inner Mongolia University for Nationalities, Tongliao, Inner Mongolia 028042, China | | BI Wen-bo | Agronomy Department of Inner Mongolia University for Nationalities, Tongliao, Inner Mongolia 028042, China | | HE Dong-dong | Agronomy Department of Inner Mongolia University for Nationalities, Tongliao, Inner Mongolia 028042, China |
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| Abstract: |
| Zhengdan958 was employed as the experimental material under the condition of earth pillar cultivation, using no phosphorus as control, to investigate the effects of four phosphorus placement depths including 6, 12, 18 cm, and 24 cm, on the accumulation and transportation of dry matter and phosphorus nutrient in spring maize. The results showed that with the increase of phosphorus depth, dry matter accumulation amounts and grain yield were increased first and became decreased afterwards, all reaching the maximum at the 12 cm phosphorus placement depth. For leaf and stem-sheath dry matter translocation amounts and translocation rates, the contribution rates to grain were all the maximums at the 6 cm phosphorus placement depth. The phosphorus contents and accumulations of organ at the 12 cm phosphorus placement depth were the maximums. For phosphorus translocation amounts and translocation rates, the contribution rates to grain at the 6 cm phosphorus placement depth were overall the highest. The phosphorus element partial factor productivity, absorption and utilization rates were all the maximums at the 12 cm phosphorus placement depth, reaching significant different levels. It showed that moderately increasing phosphorus placement depths was an effective approach to the improvement phosphorus utilization rate. |
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