000			01683nam a2200193Ia 4500
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100			_aRao P S
245		0	_aStudies on the relationship between yield and meteorological parameters of para rubber tree (Hevea brasiliensis)
260			_bAgricultural and Forest Meteorology _c1998
300			_a235-245
500			_aSource Year: 1998
520			_aThe relationship between latex yield of natural Hevea trees and climatic variables was investigated. Under humid tropical rainfed conditions in India, the latex yields of Hevea (clone RRII 105) were between 19.8 and 90.5 g pe tree per tap. The highest temprature experienced during 1, 7 or 30 days prior to tapping explained about 32, 42 and 64;respectively, of the day-to-day variabilility in latex yields. Multiple regression models to estimate latex yield on a tapping day, with different antecedent weather conditions were developed. Weekly weather conditions associated wtih best yields are: maximum temperature of 30.4 degree C, minimum temperature of 22.8 degree C, 5.9 h sunshine and 72 mm of rain. Any deviation from these meteorological conditions for up to a period of 6 months may significantly influence latex production. In general, highest temperature, sunshine duration, vapour pressured deficit and pan evaporation showed significant negative correlations with yield, irrespective of the time period considered. A significant positive association was observed between rainfall for >1 month and latex yield.
650			_aHevea brasiliensis
650			_aLatex yield
700			_aSaraswathyamma C K
700			_aSethuraj M R
856			_uhoa
942			_cJS
999			_c69731 _d69731