| Effect of regulated deficit irrigation and fertilization on dry matter accumulation and related physiological properties of maize |
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| DOI：10.7606/j.issn.1000-7601.2010.04.15 |
| Key Words: maize water deficit fertilization level rewatering water use dry matter accumulation physiological properties |
| Author Name | Affiliation | | WEI Caihui | College of Agriculture，Cuangxi University，Nanning, Guangxi 530005, China | | LI Fusheng | College of Agriculture，Cuangxi University，Nanning, Guangxi 530005, China | | XU Chunhui | College of Agriculture，Cuangxi University，Nanning, Guangxi 530005, China | | NONG Mengling | College of Agriculture，Cuangxi University，Nanning, Guangxi 530005, China | | YU Jiangmin | College of Agriculture，Cuangxi University，Nanning, Guangxi 530005, China | | LUO Hui | College of Agriculture，Cuangxi University，Nanning, Guangxi 530005, China |
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| Abstract: |
| A pot experiment was carried out to study the effect of four water deficit levels during the jointing and tasseling stages of maize crop, i.e. serious water deficit(SD 40% ~ 50% θf, θf is field water capacity), medium water deficit( MD, 50% ~ 60% θf), mild water deficit(LD, 60% ~ 70% θf) and normal irrigation(CK, 70% ~ 80%θf) on dry matter accumulation, water use and related physiological properties of maize under two fertilization levels. Fertiliza-tion was benefcial for dry matter accumulation of maize, LD treatment did not decrease or slightly increased total dry matter of maize , but SD treatment decreased total dry matter sigmnificantly at the jointing and tasseling stages, and any Water deficit and fertilization level had no significant effect on canopy water use efficiency. Compared to CK, LD treatment had insignificant effect on leaf chlorophyl(Chl) , soluble sugar(SS) , proline(Pro) and malondialdehyde(MDA) contents, and superoxide dismutase(SOD), peroxidase(POD) and catalase(CAT) activities during the two growth stages . However, SD treatment declined the Chl content and SOD, POD and CAT activities greatly, but increased ss, Pro and MDA contents significantly. Rewatering can recover the physiological and biochemical indices to the levels of CK after suffering the LD treatment and the levels of CK to some extent after suffering the MD treatment, but it cannot recover them to the levels of CK after suffering the SD treatment. Thus mild water deficit during the jointing and tasseling stages is suitable
for the regulated deficit irrigation of maize crop in this experiment. |
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