نوع مقاله : مقاله پژوهشی
عنوان مقاله English
نویسندگان English
Introduction: One of the increasing methods of water consumption efficiency, is evaluation of irrigation systems especially surface irrigation systems as the most widely uses irrigation method. Organic materials also because of their benefical effects that have on physical, chemical, biological and fertility traits of soil, are considered one of the important aspects of soil fertility.in order to evaluate the consumption of organic fertilizers and their integration on economic yeild (leaf) of lemon verbena and some combination on leaf yield to lemon verbena (Lippia citrodora L.) and some physical and chemical characteristics of soil under different irrigation methods,
Materials and Methods: an experiment was performed as split plots based on a randomized complete block design was carried out at the Agricultural Research Institute of Zabol University (Chah Nimeh) with three replications in two cropping years 2017 and 2018. The main factor included three irrigation methods: flood irrigation, furrow irrigation and drip irrigation and the secondary factor included the use of organic fertilizers and their combination in 5 levels: no Consumption of fertilizer (control), cattle manure (30 tons per hectare), poultry manure (5 tons per hectare), vermicompost (5 tons per hectare), combination (15 tons per hectare of cattle manure + 2.5 tons per hectare of poultry manure). data related to evaluated traits were analized using SAS software (version 9.1). tables were drawn using word and excel software. Comparison of means treatment was done using Duncan's multiple range test at the 5% Probability level.
Results and Discussion: result showed that the highest economic yield (leaf) to lemon verbena was obtained by flooding irrigation method and lowest by drip irrigation method. In other words leaf yield decreased in the dripping method by 12.1% compared to the flooding method that this reduction can be attributed to soil salinity and high air temperature during the plant growth period and lack of sufficient leaching of saline solutions in the drip irrigation method, among organic fertilizers treatments the highest economic yield was obtained from 30 tons per hectare of cow manure treatment, and the lowest by control treatment. cow manure improves plant growth and yield by increasing the water holding capacity of the soil, incrasing soil microbial diversity, improving part of the nutrients needed by plant. using organic fertilizer was increased soil nitrogen, potassium and sodium content and decreased soil bulk density. The highest amount of soil organic matter, soil phosphorous were obtained from interaction drip irrigation treatment and consumption of 30 tons of cow manure. There was no statistically significant difference between drip irrigation and half cow manure +half poultry manure treatment. Increasing amount of soil organic matter in these treatments can be because of increasing carbon input from cow manure. interaction between effect of cow manure and drip irrigation increases soil organic matter by increasing the availability of soil nutrients along with ability to hold soil moisture because of creating a favourable environment for activity of soil microorganisms.
Conclusion: Therefore, it can be said to substitude organic fertilizers instead of chemical fertilizers in lemon verbena improves physical and chemical properties of soil and reduces environmental effects of chemical fertilizer, also use of drip irrigation greatly reduces water consumption in lemon cultivation compared to traditional irrigation methods.
کلیدواژهها English
