جستجوی مقالات مرتبط با کلیدواژه « intercropping advantage » در نشریات گروه « زراعت »

In order to evaluate the effects of different intercropping patterns on yield components, yield and land use efficiency at diffirent intercropping patterns of dill (Anethun graveolens L.) and fenugreek (Trigonella foenum-graecum L.), a field experiment was arranged based on a randomized complete block design with three replications at a farm located in West Azerbaijan province- city Nagadeh, Iran during growing reason of 2011-2012. Treatments included row intercropping (one row of fenugreek one row of dill), strip intercropping (two rows of dill one rows of fenugreek, three rows of dill one rows of fenugreek, two rows of fenugreek one rows of dill, three rows of fenugreek one rows of dill, two rows of fenugreek two of dill) and solecropping dill and fenugreek. Intercropping patterns had significant effect on all of mentioned traits. The highest grain yield and biological yield of fenugreek were achieved in solecropping with 940 and 3103 kg.ha-1, respectively. Results showed that the maximum grain yield and biological yield of dill obtained of three rows of dill one rows of fenugreek with 860 and 4816.67 kg.ha-1, respectively. The essential oil percentage (2.85) of all treatments was higher than solecropping (2). The highest Land equivalent ratio (1.90) was obtained in two rows of fenugreek two rows of dill. The maximum Actual yield loss (2.18) and Intercropping Advantage (1.28) were obtained in three rows of fenugreek one rows of dill that represents an increase advantages in intercropping than solecropping.

To evaluate the yield components، yield and land equivalent ratio affected by relay intercropping of sunflower (Helianthus annuus L.) with faba bean (Vicia faba L.)، a field experiment was arranged based on a randomized complete block design with three replications at the Agricultural Research Station Payamenoor University of Nagadeh، Iran during growing reason of 2012-2013. The treatments included row intercropping)one row of sunflower + one row of faba bean (، strip intercropping) two rows of faba bean + four rows of sunflower، four rows of faba bean + two rows of sunflower، three rows of faba bean + three rows of sunflower (and monoculture faba bean and sunflower. The results indicated that the relay intercropping patterns had significant effect on studied traits of sunflower and faba bean (except number of seed per pod of faba bean). The highest seed yield of sunflower (4140 kg/ha) and faba bean (2567. 33 kg/ha) were obtained from row intercropping and the lowest seed yield of sunflower (3136. 67 kg/ha) and faba bean (1957 kg/ha) were obtained in their monoculture. The oil percentage of all intercropping treatments was higher than monoculture. The maximum land equivalent ratio (1. 85) and actual yield loss (1. 74) were calculated in row intercropping and the highest intercropping advantage (1. 25) was achieved in four rows of faba bean + two rows of sunflower. The results showed that the use of relay intercropping results in better utilization of environmental resources and increased crop production compared to monoculture of the same species.

In order to study of use advantage in the intercropping system fennel (Foeniculum vulgare Mill) and fenugreek (Trigonella foenum-graecum L) in different ratios of intercropping and sole cropping, an experiment with use replacement and additive intercropping based on randomized complete block design with three replications was conducted at the Research Station of Faculty of Agriculture, University of Zanjan, Iran, during growing season 2012. Treatments included additive intercropping in three levels (100 percent fennel + 33, 66 and 100 percent fenugreek), replacement intercropping in six levels (1:1, 1:2, 2:1, 2:2, 1:3, 3:1), Sole fennel and Sole fenugreek. Results showed that the highest grain yield of Fenugreek was obtained in pure stand of Fenugreek and the lowest of mentioned trait was obtained in the 75 percent fennel + 25 percent fenugreek (3:1) replacement series. Also the highest and the lowest fennel grain yield were obtained in 100 percent fennel + 33 percent fenugreek additive series and 25 percent fennel + 75 percent fenugreek (1:3) replacement series respectively. yield of essential oil at 100 percent fennel + 33 percent fenugreek additive series were higher compared with sole cropping. The highest Land Equivalent and Relative Value Total obtained from 100 percent fennel + 33 percent fenugreek additive series. The highest Actual Yield Loos or gain (AYL) and intercropping advantage (IA) obtained from 25 percent fennel + 75 percent fenugreek (1:3) replacement series. Aggressively index revealed that in most sowing ratios fennel was dominant and fenugreek was defeated.

Increasing diversity and apply intercropping systems is one of approaches to control of weeds. To evaluate the effects of additive maize-bean intercropping on yield، yield components and weeds in Zanjan conditions، a field study was conducted in a spilt plot with randomized complete block design in three replications at Research Farm of Zanjan University in 2010. Main plots were the different patterns of additive intercropping systems in 6 levels included: sowing 20، 40، 60 and 80% of bean optimum density + 100% of maize optimum density and sole cropping of the crops and sub-plots were control and non-control of weeds. Density and biomass of weeds was sampled during growth season for comparing the amount of weeds control among different treatments. Yield and yield components of two crops were measured at the harvest time and advantage of intercropping was calculated by use of intercropping evaluation indices. The results showed that the most of weeds control was obtained in 80% bean+100% maize (reduction of 70% compared to sole cropping) and the highest and lowest yield of maize under non-control of weeds conditions were observed in 60% bean + 100% maize (7813 kg ha-1) and sole cropping (6530 kg ha-1) treatments، respectively. According to the all of indicators، intercropping had advantages compared to the monoculture of the crops. The intercropping of 80% bean + 100% maize had the highest advantage based on Land Equivalent Ratio (LER)، Actual Yield Loss or Gain (AYL) and Intercropping Advantage (IA) but the highest advantage was obtained in the treatment of 60% bean + 100% maize by Relative Value Total (RVT) indicator and the intercropping of 40% bean + 100% maize showed the highest value as used of Relative Crowding Coefficient (RCC).