000			01349nam a2200241Ia 4500
008			220216s9999 xx 000 0 und d
100			_aRondon E V
245		0	_aSystems of low-frequency tapping with the use of a stimulant in rubber plantations in Mato Grosso State
260			_bPesquisa Agropecuaria Brasileira _c1997
300			_a51-56
500			_aSource Year: 1997
520			_aIn trials from September 1989 to December 1993, trees in 8-year-old stands of rubber clones IAN 873 and IAN 717 at 2 sites in Mato Grosso, Brazil were tapped on virgin bark 1.5 m above ground level at intervals of 2, 3, 4 or 7 days and were treated with the stimulant Ethrel [ethephon] at 2.5;at a rate of 1 ml solution/tree, 4, 6, 8 or 10 times annually, 3 days before tapping. Tapping at intervals of 4 or 7 days and stimulation 10 times/year gave the highest latex yields. Although IAN 717 was more prone to drying-out of the panel of bark, this clone produced significantly more dry rubber (1.29 t/ha per year) than clone IAB 873 (0.58 t) under the same conditions of production.
650			_aLow-frequency tapping
650			_aMato Grosso
650			_aRubber plantation
700			_aAbreu J G DE
700			_aSantos A M DOS
700			_aSilva D DA
700			_aSouza C A F DE
700			_aVital A R
856			_uHOA
942			_cJS
999			_c70194 _d70194