Effect of seed size and seed deterioration on yield and yield components of dryland wheat in saline region of Gorgan
Subject Areas : New Finding in AgricultureH. Ajam Nouruzi 1 , A. Sadeghnezhad 2 , GH. Gazanchian 3
1 - Department of Agronomy and Plant Breeding, Gorgan Branch, Islamic Azad University, Gorgan, Iran
2 - M.Sc. in Agronomy, Bojnord Branch, Islamic Azad University, Bojnord, Iran
3 - Department of Agronomy and Plant Breeding, Bojnord Branch, Islamic Azad University, Bojnord, Iran
Keywords: Performance, Salinity, Wheat, Seed size, Seed deterioration,
Abstract :
The effect of seed size and seed quality on yilde and yield components in dryland wheat were studied in saline soils in Gorgan. For this purpose, three different seed sizes of Kuhdasht variety were considerd on the basis of sieving devices achieving different sizes, large (TSM1 48 gr), medium (TSM 36 gr) and small (TSM 29 gr). seed were deteriorated on the basis of accelerated aging test. Duration of seed deterioration including (control), 2, 4, 6 and 8 days at temperature 40 º C were considered as five different treatments. Afterward, deteriorated seeds were sown in the field in desember 2007. A factorial experiment comprising those three seed size and durations of seed deterioration (3×5) was run within a randomized complete block design (RCBD) with four replications (in the saline areas, station of saline research Anbarolom located at 35 kilometer in north of Gorgan), The experiment was ended in july 2008 and samples were taken by the time. The results showed seed deterioration reduced all measured crops properties including plant height, stem and spike lenght, spikelets number per spike, grain number per spike, grain number per spikelets, total grian yield, thousand seed mass, stubble weight. The results also showed that economical and biological yield, as well as harvest index were negative affected by increasing of deterioration period. seed deterioration plant density per unit area, leading to low yield particularly in stress condition such as salinity. The large and medium seeds were superior than small seeds in most measured factors.
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