Impact of Ssuper Absorbent Polymer and Irrigation Management on Seed and Essential Oil Yields of Cumin
نویسندگان
1 Department of Agronomy and Plant Breeding, Faculty of Agriculture, University of Birjand, Birjand, Iran
2 Seed Science and Technology Group, Department of Agronomy and Plant Breeding, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
3 Department of Agronomy and Plant Breeding, Faculty of Agriculture, University of Birjand, Birjand, Iran
4 Department of Agronomy and Plant Breeding, Faculty of Agriculture, University of Birjand, Birjand, Iran
5 Department of Agronomy, Ferdowsi University of Mashhad, Mashhad, Iran
6 Department of Agronomy and Plant Breeding, Faculty of Agriculture, University of Birjand, Birjand, Iran
doi
10.22092/jmpb.2016.109390چکیده
Two field and laboratory experiments were conducted to investigate the effects of superabsorbent polymer (SAP) and irrigation management on seed and essential oil yields of Cumin, as well as the impact of water quality on water holding capacity of SAP. Salinity had a negative effect on the amount of water absorbed by SAP (335 and 59 g H2O per g SAP, for distilled water and solution of 0.5% NaCl, respectively). SAP application (30 kg.ha-1) along with three times irrigation at sowing, flowering and seed filling stages increased the amounts of seed and essential oil yields by 2.79 and 3.05 times, compared to control. Positive effects of SAP were related to enhancement of soil water holding capacity (120 gr irrigation water per gr SAP), leaf area duration (one week) and subsequently grain filling period.
