تأثیر آبیاری زیرزمینی و مدیریت آبیاری بر مشخصه‌های رشد و اجزای عملکرد برنج در منطقه خشک و نیمه خشک

نوع مقاله : مقالات پژوهشی

نویسندگان

دانشگاه شهرکرد

چکیده

هدف اساسی مدیریت‏های نوین آبیاری برنج، افزایش بهره‏وری آب مصرفی و صرفه‏‎جویی آب در اراضی شالیزاری می‏باشد. برای بررسی تاثیر موقعیت سطح ایستابی بر بهره‌وری آب در کشت برنج،آزمایشی به صورت کشت گلدانی در قالب طرح آماری کاملا تصادفی در دانشگاه شهرکرد با چهار مدیریت آبیاری، شامل سطحی با کنترل سطح ایستابی در 2 سانتی‏متری روی سطح خاک(FI)،زهکشی کنترل شده با کنترل سطح ایستابی در 20 سانتی‏متری زیر سطح خاک (CD20) وکنترل سطح ایستابی در 36 سانتی‏متری زیر سطح خاک (CD36) و آبیاری تناوبی (AI) انجام گردید. در طول فصل رشد چهار مرتبه نمونه‌برداری برای تعیین میزان ماده خشک برگ، ساقه ومیزان آماس نسبی برگ انجام گرفت ودر پایان فصل رشد میزان حجم آب مصرفی و میزان دانه تولیدی اندازه‏گیری و ثبت گردید. نتایج نشان داد کاهش عملکرد دانه برای تیمارهایAI ,CD36 ,CD20 به ازای هر یک واحد کاهش آب مصرفی به ترتیب به میزان 36/0، 46/0 و 38/0 واحد می‏باشد. مدیریت آبیاری موجب کاهش معنی‏دارآماس نسبی در مراحل اول و دوم اندازه‏گیری در سطح احتمال 5 و در مرحله چهارم درسطح 1 درصد شد. کاهش ماده خشک تولیدی نیز تحت مدیریت آبیاری در مرحله دوم و چهارم در سطح یک درصد و در مرحله سوم در سطح احتمال 5 درصد معنی‏دار شد. اما کاهش آب مصرفی در تیمارهای AI ,CD36 ,CD20موجب افزایش معنی‏دار 5 درصدی راندمان مصرف آب مبتنی بر عملکرد و افزایش معنی‏دار یک درصدی راندمان مصرف آب مبتنی بر زیست توده گردید.

کلیدواژه‌ها


عنوان مقاله [English]

The Effect of Controlled drainage and Irrigation Management on Growth Characteristics and Rice Yield in the arid and semi-arid

نویسندگان [English]

  • Sayyedeh Maryam Mirabolghasemi
  • Mahdi Ghobadi Nia
  • A.R Ghasemi
  • M.R. Nouri-Emamzadeie
Shahrekord University
چکیده [English]

Introduction: Rice is one of the cereals that are widely used food in the world as staple.Rice is the largest consumer of water among agricultural products.At the field level, rice receives up to 2–3 times more water per hectare than other irrigated crop for producing of one kilogram of rice.Accordingto water resources limitation in Iran, According to water resources limitation in Iran, careful planning is essential to optimal use of water resources in agriculture as the largest consumer. One of the methods to reduce water consumption in rice cultivationis changing the traditional irrigation methods (flooding) to periodic irrigation. Change of management from traditional water-logging irrigation to unsaturated improves the irrigation water use efficiency. Due to water scarcity problems, the aim of this study was to evaluate controlled drainage and the impact of irrigation management on growth characteristics and yield components of rice in the arid and semi-arid.
Materials and Methods:To Considering the effect of water table level on water productivity in rice cultivation, the study was done in Shahrekord university. The experiments conducted in pots with 40 cm diameter and 45 cm hight. The experiment was arranged following a completely randomized design with four treatments (water table level) and five repetitions. The water table managements including: control water table 2 cm on the top of the soil (FI),the control water table 20 cm below the soil surface (CD20), control water table 36 cm below the soil surface (CD36) and Intermittent irrigation(AI). Tocontroll the water level, two tanks were used, one as stabilizer water table and another to measure the amount of water used. The Treatmentsares are completely water logging for a week, in second week treatments were applied. Sampled four times during the growing season was performed to determine the dry matter content of leaf, stem and leaf relative swelling and at the end of the growing season, the volume of water consumed, harvest index, the amount of grain produced and thousand grain weight was measured and recorded. The data obtained were analyzed using SAS software and LSD test was performed for comparison of means.
Results and Discussion:The results showed reduced yield treatments for CD20, CD36 and AI for each unit reduction in water consumption respectively as much 0.36, 0.46 and 0.38 units. Also results showed irrigation management caused significantly decrease in swelling relative only in the first and Second measuring stages respectively at the 5 percent level and in the fourth measuring stages at 1 percent level. Dry matter productive also was reduced under irrigation management in the Second and fourth measuring stages respectively in 1st and 3rd measuring stages at the 5 percent level. The impacts of irrigation management are no statistically significant on the rice harvest index and thousand grain weights but water consumption was reduced in CD20, CD36 and AI. Resulted to increment 5 percent water use efficiency based on performance and a significant increase 1 percent in the efficiency of water use was based on biomass. The highest and lowest harvses index belongs to FI (39.1) and CD36 (35.4) respectly. The highest and lowest thousand grain weights belong to FI (1247 kg/ha) and CD36 (1101 kg/ha) respectly.
Conclusions:High water Stress causes roots gone to sleep and their growth will slow after re-watering. Water scarcity is not only the hinder root growth but causes the root fuzzy and reduce its ability to absorb substances. The results showed that water reduction, a significant decrease in grain yield not occurred, Lack significant differences in grain yield mean that the water supply was adequate at all levels and in none of irrigation regimes, the plant was not affected by water stress and plant roots grown have enough at critical stages that needs greater water and has access to available water at greater depths. Results showed that T2 (control water table level at 20 cm below surface of soil) for each unit reduction in water consumption, 0.36 units reduces seed productionand 16% reduction in the amount of dry matter, That these lowest values are in the between treatments. With this irrigation management and reduce water consumption by 23% compared to control treatment area under cultivation can increased by as much as 30% and the grain production increase from 3424 to 4210 Kg per hectare.

کلیدواژه‌ها [English]

  • Controlled Drainage
  • Intermittent irrigation
  • Reduce of water consumption
  • Relative swelling
1- Alizadeh A. 2005. The relationship betweenwater, soil and plant.the fourth editionthe University of ImamReza.Mashhad.
2- Amiri A. Rezaii M. 2010. Investigate the changesof water productivityin paddy fields ofGuilan.The secondnational conference ofthe effects ofdroughtanditsmanagement practices. 15-16 May. 2010.Research Center for AgricultureandNatural Resourcesand the headquartersofunexpected eventsIsfahan.
3- Amiri E. 2006. Investigation of water balance and rice yield under irrigation management whit model, (modeling and field experiments). Ph.D Thesis. Tehran Islamic Azad University. Iran. (In Persian).
4- Amiri E. 2006 Studing water balance in different irrigation methods in paddy fields (field experiment and model).PhD dissertation in irrigation and drainage.Tehran Azad university. Iran.
5- Bienvenido O. 1993. Rice in human food and nutrition.International Rice Research Institute.166p.
6- Belder P. Bouman B.A.M. Cabangon R. Lu G. Quilang E.J.P. Li Y. Spiertz J.H.J. and Tuong T.P. 2004. Effect of water-saving irrigation on rice yield and water use in typicallowland conditions in Asia. Agricultural Water Management 65(3): 193–210.
7- Fathi G.A.N. Ariannia M.R. and Golizadeh E. 2009. Field crop physiology.Islamic Azad University, Shooshtar Branch. (In Persian).
8- GilaniA.Absalan.S.H. 2005. Final report ofthe research project, the effect ofsurface irrigationregimeson yield andgrowth characteristicsof three varieties ofriceinthe province of Khuzestan, Rice Research institute.
9- Jannati M. 2003. The impact of Plantingpatternon growth andyield and yield componentsof sunflowerhybridsSun33.AgricultureMaster's thesis. College of Agriculture.Isfahan University of Technology. Iran.
10- Kafi M.Zand A.Kamkar B.Sharifi H.Gholdani M. 2001. Plant Physiology(translation), The University ofMashhad, the second volume.
11- KoochakiA.Hoseini M. 1995. Energy efficiency inagriculturalecosystems. Universityof Mashhad.
12- Laffitte R. 2002. Relationship between leaf relative water content during reproductive stage deficit and grainformation in rice. Field Crops Research, 76: 165-174.
13- Manderscheid R. Pacholski A. Fruhauf C. and Weigel H. 2009. Effects of free aircarbon dioxide enrichment and nitrogen supply on growth and yield of winterbarleycultivated in a crop rotation. Field Crops Research, 110: 185–196.
14- Moaddabshabestary M. Mojtahedi M. 1991. Crop physiology. PublishingCenterof Tehran University.
15- Molden D. Murry-Rust H. Sakthivandival R. and Makin I. 2001. A water productivity framework for understanding and action. Workshop on Water Productivity. 12 -13 November.Wadduwe, Sri Lanka.
16- Nahvi M. 2006. Determination the best irrigatin interval based on growth indices.Master's Thesis. Azad university.
17- Pandey R.K. Marienville J. W and Adum A. 2000. Deficit irrigation and nitrogeneffect on maize in a Sahelian environment. I. Grain yield components. Agriculture WaterManagement, 46: 1- 13.
18- Rahimian H.Banayan M. 1998. Physiologicalprinciples ofplant breeding. Translation PublishingUniversity ofMashhad.
19- Rezaii M.Nahvi M. 2008. Investigate the effect ofirrigation intervalonclay soilsonwater use efficiencyandthe characteristicsoftwo varieties oflocalriceinGuilan province.AgriculturalScienceResearch, 9:16-24.
20- Rezaeii M. and Nahvi M. 2007. Effect of different irrigation management methods on water use efficiency and rice yield . Agricultural Science Research, 9:15-25.
21- Sharma B.D. Sharma U.C. andKaul. H.N. 1990. Physiological traits for highyield in potato. Indian Journal of Hill Farming, 3: 41-46.
22- Tuong T.P. and Bouman B.A.M. 2003. Rice production in water scarce environments. p.53-67. In J.W. Kijne, R. Barker and D. Molden (eds) Water productivity in agriculture.
23- Taghizadeh M. Esfahani M.Davatgar N.Madani H. 2009. Effect of irrigate on intervalandNitrogen Fertilizer onriceyield and yield componentscultivar TaromHashemiin Rasht. The findings ofmodernagriculture, 9:353-364.
24- Zhang J. Jia W. Yang J. and Ismail A.M. 2006. Role of ABA in integrating plantresponses to drought and salt stresses. Field Crops Research, 97: 111-119.
25- Zumber M. A. Chowdhury A.K. Islam M.Z. Ahmad T. and Hasa M.A. 2007. Effects of water stress on growth and yiela attribute Aman rice genotype. internationalJournal Sustain. Crop Production,26:25-30.
26- Zwart S.J. and Bastiaanssen W.G.M. 2004. Review of measured crop water productivity values for irrigated wheat, rice, cotton and maize. Agricultural Water Manage, 69: 115-133.