Responses of grass (Seashore Paspalum) to Rotational Management of Saline water

Subject Areas : Farm water management with the aim of improving irrigation management indicators

Sayyed-Hassan Tabatabaei ¹ , Mohammad Pessarakli ² , Negar Nourmahnad ³

1 - Associate Professor, Department of Water Engineering, Faculty of Agriculture, Shahrekord University, Shahrekord, Iran
2 - School of Plant Sciences, The University of Arizona, Tucson, AZ 85721, USA
3 - ssistant Professor, Department of Agriculture, Payame Noor University, PO Box 19395-3697 Tehran, IRAN

Received: 2017-01-09 Accepted : 2019-02-24 Published : 2019-04-21

Keywords: Quality, Water use efficiency, Salinity, Grass, Rotational,

Abstract :

Applying proper irrigation management can reduce the yield loss caused by salinity. Growth responses of Seashore Paspalum, in terms of shoot and root lengths, fresh and dry weights, and the general quality of the grasses were studied hydroponically in a greenhouse under rotational levels of salinity stress. The experiment was arranged as a split plot based on randomized complete block design with four replications. Treatments include of five constant salinity levels as 5, 10, 20, and 30 gr/lit (named as Ctrl, C10, C20 and C30, respectively) as well as four more rotational salinity treatments (named as A10, A20 and A30). The results showed the maximum length of root and shoot (16.67 and 6.91 cm, respectively) was observed in Ctrl. At each salinity level, dry weight and fresh weight of shoot significantly increased in grasses grown under rotational salinity/control condition compared to their corresponding treatments under constant salinity stress condition. The percent of relative water content was higher in Ctrl, C10, A10 and A20. Also, C20 and C30 have the lower relative water content. Maximum water use efficiency observed at the Ctrl and then in A20 and A30. It concludes that rotational use of saline water causes improvement of WUE in grass.