Creative Commons License 2016 Volume 3 Issue 5

Qualitative Assessment of land rating and estimation the biomass net production (BN) and yield potential(Y) for alfalfa in Jaydar plain of Poledokhtar-Lorestan (Iran)


Mohammad Zeinvand, Mahmood Reza Sadikhani
Abstract

Today, the need of optimized usage of agricultural lands is more and more because of the population growth. The study area is about 3864 hectares which is mainly in the West and South West of Poldokhtar city in the Lorestan Province and that was carried out in 33° 6´ - 33° 10´ north latitude and 47 º 37´ - 47 º 44´ east longitude. The study area is considered as an area with desert and hot climate and the winter is midland humid and the summer is long, hot and dry. The average of annual temperature is 22.6ºC, the annual evaporation is about 2800 mm and the rainfall is more than 360 mm. The maximum average of the temperature is 27.2ºC and the minimum average of it is 16.5 ºC. The maximum amount of rainfall and the minimum amount of temperature according to the data gathered in the synoptic meteorological station, is in January and December. The data that is achieved based on general American classification shows that the soil in the studied area belongs to Inspetisoils and Entisoils groups. One way to increase the production rate and optimized usage of the lands is recognizing the production capacity of the land and choosing the appropriate application of it based of production capacity. In this method, the operation is computed regardless of each kind of limitation such as soil, water and management. One important and applicable
method in order to have optimized usage of the soil resources is determining the capacity and potential of the lands. One of these methods is to estimate the potential of the product operation in ideal and optimized conditions. In this method, the operation is computed regardless of each kind of limitations, such as soil, water and management. In this research the net production of biomass (Bn) and operation potential(y) of the alfalfa in Jaydar lands in Poldokhtar in Lorestan by the use of the weather reports of synoptic station of Poldokhtar is estimated. The result shows that the amount of operation for alfalfa regardless of soil, water and management limitations equals 9tons and 203 kilograms in dry matter hectare, and 16 tons and 565 kilograms in humid matter hectare. Considering this matter that the observed operation in this area equals 9 ton in each hectare, we can increase this amount to16 tons and565 kilograms by applying proper management and eliminating the reparable limitations. Also, the Qualitative assessment of the land proportion for alfalfa was done in Jaydar based on the parametric method. The results showed that for producing alfalfa in this area proportion class in from S2 to N2 and the most limiting factors in these lands are slope, wetting, percentage of calcium carbonate, Salinity and alkalinity subsequently.

 

Keywords: Qualitative Proportion of Lands, Net production of Biomass, alfalfa, Jaydar Soils


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