Conjunctive Effects of Supplemental Irrigation and Planting Date on Rainfed Lentil in Qazvin Plain, Iran

Abstract

Rapid population increases, along with water resources deficiency, have made agricultural experts and researchers use various management techniques to improve water productivity. The term, "more crop per drop" has since came to the center of attention. One of the primary objectives in Iranian national agricultural policies is providing food security, which can be reached via this approach. There is a crucial need for improvements in production of rain-fed agriculture since there are huge rainfed cultivated areas that suffer from low yields. Hence, in this research, supplemental irrigation and sowing dates, which are two effective factors on productivity of rainfed lentils in Qazvin Plain, are investigated. The treatments included two sowing dates and four irrigation levels. The sowing dates were April 4 and April 14, and the irrigation treatments were: no irrigation, single irrigation at seedling stage, single irrigation at pod filling stage, and double irrigation at both of these stages. A factorial experiment in a completely randomized block design with three replications was conducted in agricultural research field of Imam Khomeini International University for two cropping seasons in 2011-2012. The results showed that the effects of the two factors on grain yield and biomass were highly significant at the 1% level, both separately and simultaneously. The sowing date of April 4 led to a rise in yield components. Although the double irrigation treatment with 1,329.4 kg=ha had the most grain yield, the single irrigation treatment at seedling stage with the irrigation water productivity of 1.878 kg=m 3 was the best approach when water productivity was considered. In summary, the results indicated that single irrigation at the seedling stage had better water productivity than the double irrigation treatment. This conclusion is consistent with the production functions and other research results.

Effect of Supplemental Irrigation on Lentil Yield and Growth in Semi-Arid Environment

“…In an article, Soltani et al (2015) emphasized to upgrade the low productivity of rain-fed lentils in Iran using supplemental irrigation. They tested the significance of sowing dates and supplement irrigation at different growth stages on lentil yield.…”

“…A number of researchers have conducted studies to estimate the effects of supplemental irrigation on crop yields under different growth environments and at different growth stages (Saxena, 1981;Pala and Mazid, 1992;Hamdi et al, 1992;Silim et al, 1993;Zhang et al, 2000;Oweis et al, 2004;Shamsi et al, 2010;Baker et al, 2012;Erekul et al, 2012;Dogan et al, 2013;Girma and Haile, 2014;Sui et al, 2014;Soltani et al, 2015;Ali et Other than these studies on lentil, Pandey et al (2013) established a novel approach to simulate supplemental irrigation and possible benefits of a rainwater harvesting system in rain-fed agricultural regions. Employing the approach, they estimated the soil moisture availability, crop yields in both irrigated and rain-fed environments and the impact of size of an on-farm reservoir (OFR) system.…”

Human health risk assessment of arsenic downstream of a steel plant in Isfahan, Iran: a case study

“…On the other hand, the pollution of heavy metals downstream of a steel plant has always been an issue (Soltani et al 2015;Heidari et al 2019). There are many studies considering the pollution of heavy metals such as Fe, Cr, Cd, Pb, Ni and Al in the region, but no evaluation of the status of arsenic has not been reported yet (Abduli et al 2013;Ataabadi et al 2010Ataabadi et al , 2011Isfahan 2003;Karbassi and Pazoki 2015;Pazoki and Hasanidarabadi 2017;Pazoki et al 2010;Tavakolli et al 2013).…”

Statistical analysis of bedslope, shape and fertigation timing to reduce nitrate loss in furrow fertigation.

“…Changes in temperature and precipitation due to global warming (Fayaz et al 2020) can exacerbate this situation. Considering that a major goal of Iranian national agricultural policy is providing food security through agriculture product independency that can be reached via higher water productivity (Soltani et al 2015) and fertilizer use efficiency in mostly surface irrigated Iranian farms. This requires proper fertigation techniques to avoid polluting surface and groundwater resources.…”