Evaluation of different level of cholromeqat cholorid (CCC) and plant density on lodging control in bread wheat

Subject Areas : Journal of Plant Ecophysiology

محمد  Sadeghi ¹ (دانش آموخته کارشناسی ارشد دانشگاه آزاد اسلامی واحد ارسنجان)
H.R.  Miri ² (دانشیار دانشگاه آزاد اسلامی واحد ارسنجان)

Received: 2015-01-26 Accepted : 2015-01-26 Published : 2015-01-01

Keywords: Grain yield, Plant density, Plant growth regulators, lodging,

Abstract :

Increasing plant density with the purpose of yield increasing, sometimes increases lodging in wheat that decreases photosynthesis and yield. A field experiment in factorial based on complete randomized block design was conducted in Agricultural Research Station of Zargan (Fars, Iran) to evaluate the effects of plant density and chlormequat chloride (CCC) on wheat lodging. The first factor was four plant densities (200, 300, 400 and 500 plants/m2) and the second factor was three chlormequat chloride concentrations (0, 1000 and 3000g/ha). The results indicated that the effect of plant density was significant (p<0.05). Increasing plant density up to 500 increased lodging but the effect of different levels of CCC on lodging was not significant. However, the interaction of the two factors caused significant changes on lodging. The result also indicated that plant density had a significant effect on dry matter, photosynthesis (pre and post anthesis) and grain yield but no effect on other characteristics. CCC had significant effects on dry weight, photosynthesis (post anthesis) and the interaction effect of CCC and plant density (400 plant /m2) and 3000 g CCC had the highest grain yield and lowest lodging.