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1 - Evaluating some qualitative and quantitative indices of local rice cultivars in paddy field planting systems in north of Iran
Nader Moeini MOHAMMAD REZA DADASHI Salman Dastan Abolfazl Faraji
20.1001.1.76712423.1399.15.57.6.9

This experiment was conducted with the aim of evaluating the planting systems of local rice cultivars in the research paddy fields located in Neka, Sari and Babol during 2017 and 2018. Data analysis was done based on a factorial experiment in a complete randomized block More

This experiment was conducted with the aim of evaluating the planting systems of local rice cultivars in the research paddy fields located in Neka, Sari and Babol during 2017 and 2018. Data analysis was done based on a factorial experiment in a complete randomized blocks design where planting systems including conventional, high-input, transition to organic, organic, and low-input were chosen as the first factor and cultivars including ‘Sang Tarom’, ‘Tarom Mahalli’, and ‘Tarom Hashemi’ served as the second factor. Results demonstrated that the highest mean number of panicle per m2 in both years belonged to the high-input system. The highest fourth internode lodging index was obtained at interaction of high-input and conventional system with ‘Sang Tarom’. The maximum paddy yield in both years was produced in high-input and conventional systems. The highest grain phosphorous uptake, nitrogen harvest index, potassium harvest index, and gel consistency were achieved in high-input and conventional systems. The highest grain milling efficiency in the first year belonged to the conventional system (72.83%), but in the second year, it belonged to the transition to organic system (75%). Gelatinization temperature in both years was maximum in the conventional system while it was minimum in the low-input and organic systems. Regarding the findings, it can be stated that high-input and conventional systems resulted in increase of quantitative yield, but organic and transition to organic systems led to an increased NPK uptake and improvement of the grain baking related traits. Manuscript profile
Open Access Article
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2 - Effect of pre-sowing crop rotation and nitrogen consumption on quantities and qualities yield of rice (Oryza sativa)
Seysed Rasoul Mousavi Yousef Niknejad Hormoz Fallah Salman Dastan Davood Barrai Tari
10.30495/iper.2022.688802

20.1001.1.24237671.1401.17.68.4.3

Regular rice transplanting due to flooding, puddling and leveling has a negative impact on the soil structure, chemical properties and soil microbial activity. Therefore, the study was conducted on the effect of residues of pre-sowing some plants on quantitative and qua More

Regular rice transplanting due to flooding, puddling and leveling has a negative impact on the soil structure, chemical properties and soil microbial activity. Therefore, the study was conducted on the effect of residues of pre-sowing some plants on quantitative and qualitative yield of rice in crop rotation. The experiment was conducted as split plots based on a randomized complete blocks design with four replications in Sari region during 2016 and 2017. Six crop rotation levels including fallow (control), faba bean, clover, perko, buko, and clover + ramtil + phaselia were used as main plots and four levels of nitrogen fertilizer including no consumption (control), 50% less than recommendation amount, recommendation amount based on soil test and 50% more than recommendation amount were 0, 50, 100 and 150 kg/ha of urea source as a sub plots, respectively According to the findings, the highest paddy yield (5147 kg/ha) was obtained for perko pre-sowing with 100 kg urea consumption per hectare, and pre-sowing of buko and multiple of clover + ramtil + phaselia was ranked next with 100 kg urea consumption per hectare. Totally, the highest paddy yield was achieved with pre-sowing of perko, buko, multiple of clover + ramtil + phaselia and clover and nitrogen consumption equals 100 kg urea per hectare. But, in pre-sowing of faba beans and fallow, the highest paddy yield was obtained with nitrogen consumption higher than recommendation amount (150 kg/ha). The highest protein yield was attributed to perko and buko pre-sowing. Moreover, the highest conversion efficiency, amylose content and gel consistency were obtained with perko pre-sowing, and these parameters got ranked next with pre-sowing of buko, clover + ramtil + phaselia, clover and faba bean, respectively. Manuscript profile

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