SALINITY EFFECTS ON RADIATION UTILIZATION CHARACTERISTICS OF KOCHIA (KOCHIA SCOPARIA L. SCHRAD.)

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JAMI ALAHMADI MAJID; KAFI MOHAMMAD; NASIRI MAHALATI MAHDI

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Journal: Year:2008 | Volume:21 | Issue:1 (78 IN NATURAL RESOURCES) Page(s): 177-185

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Information Journal Paper

Title

SALINITY EFFECTS ON RADIATION UTILIZATION CHARACTERISTICS OF KOCHIA (KOCHIA SCOPARIA L. SCHRAD.)

Author(s)

JAMI ALAHMADI MAJID | KAFI MOHAMMAD | NASIRI MAHALATI MAHDI | Issue Writer Certificate

Keywords

KOCHIA SCOPARIAQ3

SALINITYQ2

LIGHT EXTINCTION COEFFICIENTQ2

RADIATION USE EFFICIENCYQ2

LEAF AREA INDEXQ2

Abstract

In order to evaluate LIGHT EXTINCTION COEFFICIENT and RADIATION USE EFFICIENCY of KOCHIA SCOPARIA in response to saline stress, a study was performed at Birjand, South Khorasan, using three levels of SALINITY in irrigation water (1.5, 8.6 and 28.2 dSm-1) with three replications. Several measurements were conducted during growth season to calculate radiation fraction passed through plant canopy, and also LEAF AREA INDEX (LAI) and total dry matter (TDM). LIGHT EXTINCTION COEFFICIENT calculated with correcting fraction of plant light absorption for whole day, and using dry matter accumulation, RADIATION USE EFFICIENCY obtained in each different SALINITY level. The results showed that LIGHT EXTINCTION COEFFICIENT of Kochia was equal to 0.59 for solar noon and 0.75 for whole day. The radiation absorption of kochia rose as LAI increased, and 95% of radiation was absorbed at LAI equal to 4 to 5. LAI and total dry matter accumulation were highest in moderate SALINITY level. In general, increase in SALINITY caused a delay in early season development, and accelerated plant maturity at late season. This caused plant canopies at the highest SALINITY reached to maximum light absorption later in growth season. Increase of SALINITY from 1.5 to 8.6 dSm-1 was responsible for little increase in RUE from 2.4 to 2.5 g per MJ absorbed PAR; however, it reduced with further increase in SALINITY. Thus, it seems that moderate SALINITY levels stimulate growth and dry matter accumulation of kochia and cause kochia canopy convert the absorbed radiation to dry matter more effectively.

Cites

EFFECT OF METHANOL FOLIAR APPLICATION ON RADIATION USE EFFICIENCY, PHOTOSYNTHETICALLY ACTIVE RADIATION, EXTINCTION COEFFICIENT AND LEAF AREA INDEX OF SOYBEAN

References

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APA: Copy

JAMI ALAHMADI, MAJID, KAFI, MOHAMMAD, & NASIRI MAHALATI, MAHDI. (2008). SALINITY EFFECTS ON RADIATION UTILIZATION CHARACTERISTICS OF KOCHIA (KOCHIA SCOPARIA L. SCHRAD.). PAJOUHESH-VA-SAZANDEGI, 21(1 (78 IN NATURAL RESOURCES)), 177-185. SID. https://sid.ir/paper/19152/en

Vancouver: Copy

JAMI ALAHMADI MAJID, KAFI MOHAMMAD, NASIRI MAHALATI MAHDI. SALINITY EFFECTS ON RADIATION UTILIZATION CHARACTERISTICS OF KOCHIA (KOCHIA SCOPARIA L. SCHRAD.). PAJOUHESH-VA-SAZANDEGI[Internet]. 2008;21(1 (78 IN NATURAL RESOURCES)):177-185. Available from: https://sid.ir/paper/19152/en

IEEE: Copy

MAJID JAMI ALAHMADI, MOHAMMAD KAFI, and MAHDI NASIRI MAHALATI, “SALINITY EFFECTS ON RADIATION UTILIZATION CHARACTERISTICS OF KOCHIA (KOCHIA SCOPARIA L. SCHRAD.),” PAJOUHESH-VA-SAZANDEGI, vol. 21, no. 1 (78 IN NATURAL RESOURCES), pp. 177–185, 2008, [Online]. Available: https://sid.ir/paper/19152/en

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