The effects of tillage systems on agronomic, ecological and biochemical aspects of soybean-roselle relay intercropping

Sabeghynejad, Fariba (2019) The effects of tillage systems on agronomic, ecological and biochemical aspects of soybean-roselle relay intercropping. Doctoral thesis, university of zabol.

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In recent years, with the emergence of common agricultural problems such as water and soil pollution as well as reduced agricultural production capacity, researchers have increasingly focused on maintaining stability and improving fertility of agricultural production systems.One way to increase stability is to diversify through the use of multi cropping systems and conservation tillage.On Investigate Agronomic traits and Soil Characteristics of intercropping system includeadditive and replacement Series of Roselle and Soybean Experimental Testing at the Educational and Research Farm of Southern Research Center of Kerman Province, Jiroft, in Crop Plots of 2016 and 2017 In split plot design in a randomized complete block design with three replications.The main factor includes all types of tillage systems, no tillage and reduced tillage (disc and furrower) and conventional tillage (plow and disc plow) and sub factor included pure sole Roselle, sole soybean cultivation, 50% Roselle + 50% soybean, 75% Roselle + 25% soybean, 25% Roselle + 75% soybean, 50% Roselle + 100% soybean, 100% Roselle + 50% soybean, 100% Roselle + 100% soybean.The results of this study showed that application of no tillage and reduce tillage system and selection of suitable pattern of mixed cropping in which the share of legume plants was higher maintained the highest amount of organic carbon, nitrogen and magnesium in the soil. Therefore, the uptake of carbon, nitrogen, magnesium was greaterin the no-tillage and sole cropping system.The uptake of sodium, calcium in conventional tillage system and replacementintercropping was higher, and the uptake of potassium in the reduce tillage system and replacement intercropping culture was higher. The results also showed that yield and yield components of soybean, Roselle were significantly affected by tillage systems and different planting ratios. Statistically the effect of tillage systems and different planting ratios on plant height, stem diameter, number of lateral branches, thousand seed weight, number of bolls, biological yield, economic yield, harvest index, leaf chlorophyll and chlorophyll content b and a, The amount of anthocyanin and antioxidant activity (inhibition of free radicals) in Roselle and the amount of protein and oil in soybean seed as well as were significanton soil nutrients, temperature, volumetric moisture, bulk density and soil pHSo that the highest values of plant height, stem diameter, number of bolls, harvest index, antioxidant activity in Roselle and pods per plant and seed protein content in soybean were obtained from replacement series (50:50, 25:75 (75:25) and number of lateral branches, economic and biological yield, leaf chlorophyll and b chlorophyll content, anthocyanin content in Roselle and were obtainedplant height, number of lateral branches, thousand seed weight, economic and biological yield, chlorophyll a and b in soybean, additive series ratios (50: 100 and 100: 100).The highest nitrogen losses were also obtained from 100% soybean + 100% Roselle.The results showed that the land equivalent ratio in all different intercropping was more than one, indicating the usefulness of intercropping over their sole crop.So that the highest land equivalent ratio was obtained from intercropping50% soybean + 100% Roselle (4.66) no tillage system. Also, the maximum competition rate, aggressively and relative crowding coefficient belonged to Roselle.Overall, the results of this study confirmed the importance of intercropping legume and medicinal plant cultivation in optimizing the use of environmental resources, increasing soil fertility, and increasing the usefulness of intercropping over soleRoselle and soybean cultivation.

Item Type: Thesis (Doctoral)
Uncontrolled Keywords: competition indices, land equivalent ratio, nutrition elements, tillage, intercropping.
Subjects: S Agriculture > SB Plant culture
Depositing User: Mrs najmeh khajeh
Date Deposited: 11 Dec 2019 05:18
Last Modified: 11 Dec 2019 05:18

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