جستجوی مقالات مرتبط با کلیدواژه « ماده خشک کل » در نشریات گروه « باغبانی »

This experiment was performed to investigate the effect of different rice residue management on growth parameters of canola. This experiment was performed as a split plot experiment in the form of a randomized complete block design with three replications in the agricultural lands of Izeh city. The studied treatments include rice residue management at four levels (including 1- conventional cultivation (stubble burning), 2- cultivation in plowed land with rice residues, 3- cultivation in rice residues with a height of 20 cm, 4 - cultivation in rice residues with a height of 40 cm) and the second factor was three canola cultivars (including 401, 4815 and okapi). The results showed that the effect of rice residue management on leaf area index, total dry matter, crop growth rate, relative growth rate and net assimilation rate were significant. The effect of cultivars were significant in all measurement traits. There was no significant difference interaction between rice residue management and cultivar type on all studied traits. The maximum and minimum values in the studied traits were observed in cultivation management in cultivation in plowed land with rice residues and conventional cultivation, respectively and among different canola cultivars, the maximum and minimum values in the traits were observed in cultivar 4815 . In general, the results of the experiment showed that the cultivation in plowed land with rice residues is superior to conventional cultivation and other managements and leads to the improvement of growth parameters. Also, 4815 cultivar is superior to 401 and okapi cultivars.

In order to study the effect of drought stress and planting date on some traits of chichory (Cichorium intybus L.)، an experiment was conducted in a split plot design using randomized complete blocks design with three replications at the Agricultural Research Center of Islamic Azad University، Birjand Branch in 2011-2012. The factors included were irrigations levels (%100، %75، %50 and %25 ET0) and planting date (16 March، 2 April and 26 April). Results showed that all traits were significantly affected by drought stress، except R/S. The highest plant height، root length، width and branches number، shoot dry yield، root dry yield، total dry biomass، R/S were achieved under %100 ET0 and the highest water productivity was achieved under %25 ET0. According to mean comparisons، the highest values for all traits، except R/S، were recorded for the planting date of 16 March. The interaction effects of factors were also significant for branches number، stem dry yield، shoot dry yield، root dry yield and water productivity. Totally، the highest yield and water productivity were obtained for the planting date of 6 March. In addition، no significant difference was recorded between the treatments of %50 ET0 and %100 ET0 in 16 March in terms of total dry biomass. Therefore، %50 ET0 could be recommended especially in water deficit condition.