Green pepper production functions under single water, salinity and nitrogen stresses

Frequent droughts in arid and semi arid climates such as Iran’s not only reduced the amount of available water for agriculture but also lessen the quality of water and soil nutrients. Today, considering theenvironmental and climatic situation, using saline water along with deficit irrigation in order to maximize the productivity is a trendier than ever. The objective of this research is to assess the effects of water, salinity and nitrogen stress on green pepper (Capsicum Annum) yield through crop productionfunctions. Regarding the objective, the experiment schedule conducted for green pepper as completeaccidental blocks in a green house. The experiment was implicated in a 42 days period for 144 pots in 2014. In this experiment 4 irrigation treatments, three irrigation water salinity treatments and threenitrogen treatments were designed. After harvesting, the amount of yield containing fruit, foliage androots was weighed for each pot and then the amount of produced dried matter was measured. At the end,single crop – irrigation water, crop salinity and crop – nitrogen production functions were conducted. Resulted crop production function can indicate the quality and quantity of environmental stresses on crop yield

Keywords:

unconventional water recourses , deficit irrigation , green house cultivation , randomized complete blocks pilot experimental , produced dry matter