The study of behavior of plant residue, Azolla and Duck on weed control, yield and harvest index form in integrated culture by rice Ratooning

Subject Areas :

Mahdi Esmailli ¹ (M. Sc. Student of Science and Research , Islamic Azad University)
Hamid Reza Mobsser ² (Assistant professor of Islamic Azad University of ghemshare)
Mohammad Tagi Karbalai ³ (M.Sc. of Agronomy and breeding plant)
Mehrdad Abdi ⁴ (Assistant professor of Islamic Azad University of myianeh)
Mehran Bakhoda ⁵ (M. Sc. Student of Science and Research , Islamic Azad University)

Received: 2006-09-19 Accepted : 2006-12-17 Published : 2007-01-21

Keywords: weed, Rice Ratooning, Plant Residue, Azolla and Duck, Yield and Harvest index,

Abstract :

In order to study behavior of plant residue, Azolla and Duck on weed control, yield and harvest index of native Tarom variety ,a field experiment was conducted ratooning crop was also used factorial split into Randomized Complete Block Design (RCBD) with three replications. At ratoon crop, treatments consisted were three types of behavior with plant residue (cutting at base, common regional harvest and lockœlodging technology) main factor and Azolla at two levels (with and without), Duck also at two levels (with and without) have established subœfactor. Results form ratoon cropping also showed that the smallest number of weeds was obtained at treatment with plant residue at common regional harvest height, but at the same ratio was added to average height and mixed weeds dry weight. At treatment, Duck and Azolla with these factors caused decreasing the number, mean of weed height and mean weed dry weight .About yield, the treatment with plat residue at lockœlodging technology was the most yield. At Azolla treatment without this factor because of affecting on total number of tiller, percent of fertile tillers , number of panicle per square meter and the number of total spikelet per spike, the yield was increased. At Duck treatment also with this factor for the reason of increasing the number of total tiller per hill, number of panicle per square meter, thousand grain weight induced grain yield raising.The most yield was obtained by interaction of three [treatments] with Duck and Azolla and with per forming lockœ lodging technology.

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