Pot experiment was conducted to study deficit period,the effect of nitrogen rate and irrigation quantity on physiological index were studied. The results showed that,water deficit and nitrogen rate affected significantly on chloro2 phyll,proline and root activity of maize at different growth stages.Water deficit led to lower chlorophyll content ;nitrogen rate and chlorophyll content was positively relevant. Chlorophyll maximum appeared in the late jointing,chlorophyll started to reduce in heading stage.Water deficit could increase the proline content ;added value of proline content was compara2 tively small in seeding stage and reached the maximum in heading stage. The nitrogen apply would slightly reduce the pro2 line content. Sustained drought led to the growth of proline content limited in heading stage. Root activity increase and then decrease with the growth period.Water deficit reduced root activity ;compensation effect of root activity was obvious after water covered.Nitrogen application could enhance root activity under same water condition. The best treatment was coupling of water deficit in seedling stage and high nitrogen.
LIU Xiao-gang
,
ZHANG Fu-cang
,
YANG Qi-liang
,
LI Zhi-jun
. Response of Chlorophyll,Proline and Root Activity of Maize to Regulated Deficit Irrigation and N Fertilization Treatment[J]. Acta Agriculturae Boreali-Sinica, 2009
, 24(4)
: 106
-111
.
DOI: 10.7668/hbnxb.2009.04.022
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