สืบค้นงานวิจัย
Sap Flow and Water Status in Adult Rubber Trees
Kunjet Summit - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): Sap Flow and Water Status in Adult Rubber Trees
ผู้แต่ง / หัวหน้าโครงการ (EN): Kunjet Summit
บทคัดย่อ (EN): Interactions of large scale plantations with variable environment is a major issue. This research studies the water relations in soil and plant in 13 years old rubber plantation, under natural condition of Chachoengsao Ruber Research Center (CRRC). In order to assess water balance of tree plantation on plot scale, it is necessary to partition total water flux measured by eddy-covariance. Therefore, accurate dynamic measurement of tree transpiration is required. Sapflow was measured by heat dissipation method (Granier, 1987) using 20 mm-long radial probes, connected to a data logger. The calibration of the probes was checked in laboratory with reference to the gravimetric method. We adjusted the experiment devices to rubber field conditions and evaluated the different sources of variability to design the appropriate monitoring process. The sapflow density decreased in the defoliation period and increased along the refoliation period during dry season, after that it was almost constant during vegetative growth period except during high rain events. Stand transpiration was quite similar to sapflow density. On a tree scale, seasonal and daily time of leaf water potential across the canopy and stomatal conductance were monitored together with climate data and soil moisture content. The soil moisture content was measured by gravimetric method and tensiometer. Plant water potential was measured with pressure chamber and stomatal conductance was detected by LI-6400. A positive relationship was found between soil metric potential and daily stomatal conductance. However, daytime leaf water potential was unaffected by soil water content. In addition, leaf water potential depended on measurement height and daily stomatal conductance related to leaf water potential, sapflow density, and height.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เผยแพร่โดย (EN): การยางแห่งประเทศไทย
คำสำคัญ (EN): water status
เจ้าของลิขสิทธิ์ (EN): การยางแห่งประเทศไทย
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Kunjet Summit. "Sap Flow and Water Status in Adult Rubber Trees". ไม่ระบุหน่วยงาน. ม.ป.ป.

Kunjet Summit. "Sap Flow and Water Status in Adult Rubber Trees". ไม่ระบุหน่วยงาน. ม.ป.ป.. Print.



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Sap Flow and Water Status in Adult Rubber Trees
Kunjet Summit
การยางแห่งประเทศไทย
ไม่ระบุวันที่เผยแพร่
Drought and Trunk Phloem Necrosis (TPN) Effects on Water Status and Xylem Sap Flow of Hevea brasiliensis Seasonal Changes in Xylem Sap Flow Rate in Mature Rubber Trees Effects of drought and tapping for latex production on water relations of Hevea brasiliensis trees POTENTIAL OF INCREASING THE PLANTING DENSITY OF RUBBER IN SRI LANKA STUDY ON THE POTENCY OF SERRATIA BACTERIA USED TO CONTROL WHITE ROOT DISEASE IN RUBBER The Role of Myanmar Rubber Planters and Producers Association (MRPPA) in Natural Rubber Development and its Recent Activities Effect of Temperature Constraints on Photosynthesis of Rubber (Hevea brasiliensis) SUPPORTS OF THE VIETNAM RUBBER ASSOCIATION FOR RUBBER INDUSTRY FEASIBILITY OF RUBBER (Hevea brasiliensis Mull. Arg.) CULTIVATION IN THE EASTERN PROVINCE OF SRI LANKA; A NON TRADITIONAL AREA FOR RUBBER Rubber Particles Proteins and Sensitivity to the Tapping Panel Dryness at Hevea brasiliensis
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พัฒนาระบบโดยศูนย์ความรู้เฉพาะด้านวิศวกรรมความรู้และวิศวกรรมภาษาDeveloped by Center of Excellence for Unified Knowledge and Language Engineering
สนับสนุนโดยสำนักงานพัฒนาการวิจัยการเกษตร (องค์การมหาชน)Supported by the Agricultural Research Development Agency (Public Organization)
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