Journal of Food, Agriculture and Environment




Vol 12, Issue 1,2014
Online ISSN: 1459-0263
Print ISSN: 1459-0255


Effects of placement depth of phosphorus on growth and yield of maize (Zea mays L.)


Author(s):

Ya-li Zhao 1, 2, Jian-feng Chang 1, 2, Chun-shou Yang 1, Chao-hai Li 1, 2*

Recieved Date: 2013-10-16, Accepted Date: 2014-01-08

Abstract:

Phosphorus (P) is a critical macronutrient for maize growth and development. The objective of this study was to investigate the effects of P placement depth on maize growth and yield. Three pot experiments and a field experiment with same treatments were carried out during 2006-2008. The study investigated the growth and yield responses of maize to four P placement depths (CK, nil-P; T5, shallow P band placement at 5 cm; T15, deep P band placement at 15 cm; T5/15, split P band placement at 5 cm and 15 cm). P placement significantly increased maize yield by 14.1% compared with the nil-P control. The maize yield of the three P placement depths decreased in the order of T15, T5/15 and T5. The yield of T15 was 5.2% and 9.9%, higher than that of T5/15 and T5, respectively. The shoot and root biomass, leaf area index and photosynthetic rate of maize also increased significantly with P placement. Compared with split P placement (T5/15) and shallow P placement (T5), the shoot biomass of deep P placement (T15) increased by 11.2% and 20.0%, root biomass increased by 9.6% and 15.9%, leaf area index increased by 10.3% and 17.3%, and photosynthetic rate increased by 14.0% and 21.7%, respectively. It is concluded that P placement depths have significant effect on maize growth and production, and deep P placement is better than split and shallow P placement in yield and growth improvement of maize. The optimal P effects can be achieved in maize growth and production when P fertilizer is deep applied at a depth of 15 cm.

Keywords:

Shoot biomass, root dry weight, root-to-shoot ratio, leaf area index, photosynthetic rate


Journal: Journal of Food, Agriculture and Environment
Year: 2014
Volume: 12
Issue: 1
Category: Agriculture
Pages: 251-254


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