1996 Hemp Trial Ontario Canada 11-12

1996 Hemp Trials in Ontario, Canada 11-12

Courtesy of Gordon Scheifele, M.Sc et. al.: Previous pages 8-11 or Next pages 12-13

Hemp roots produced about 3 x more biomass than corn roots per hectare in ½ the growing season Graph 15.1 above. Compared to the entire plant biomass the roots were 15% of the total graph 18.2. The nutrient composition of the roots was: N - 18, P - 3, K - 51, Mg - 3.9, and Ca - 16.8 kg/ha assuming 3,000 kg/ha DM root biomass Graph 15.2 below. There was not much difference between roots of Unico-B and Kompolti.

Hemp Root Biomass

Hemp roots produced about 3 x more biomass than corn roots per hectare in ½ the growing season. Compared to the entire plant biomass the roots were 15% of the total Graph 18.2. The nutrient composition of the roots was: N - 18, P - 3, K - 51, Mg - 3.9, and Ca - 16.8 kg/ha assuming 3,000 kg/ha DM root biomass Graph 15.2 above. There was not much difference between roots of Unico-B and Kompolti.

16. TOTAL HEMP PLANT BIOMASS AND NUTRIENT COMPOSITION

The total hemp plant nutrient uptake was 325 kg/ha - N, 92 kg/ha - P, 414 kg/ha - K, 54 kg/ha - Mg and 389 kg/ha - Ca. The stems removed 31% N of the 325 kg/ha uptake allowing 69% N to be returned to the soil in organic form; 67% P of the 92 kg/ha uptake allowing 33% P to be returned to the soil in organic form; 47% K of the 414 kg/ha uptake allowing 53% K to be returned to the soil in organic form; 72% Mg of the 54 Kg/ha uptake allowing 28% Mg to be returned to the soil in organic form and 28% Ca of the 389 kg/ha uptake allowing 72% Ca to be returned to the soil in organic form. See Graph 16.1 below.

Hemp Plant Nutrient Uptake and Return

The total hemp plant nutrient uptake was 325 kg/ha - N, 92 kg/ha - P, 414 kg/ha - K, 54 kg/ha - Mg and 389 kg/ha - Ca. The stems removed 31% N of the 325 kg/ha uptake allowing 69% N to be returned to the soil in organic form; 67% P of the 92 kg/ha uptake allowing 33% P to be returned to the soil in organic form; 47% K of the 414 kg/ha uptake allowing 53% K to be returned to the soil in organic form; 72% Mg of the 54 Kg/ha uptake allowing 28% Mg to be returned to the soil in organic form and 28% Ca of the 389 kg/ha uptake allowing 72% Ca to be returned to the soil in organic form. See Graph 16.1 above.

Assuming a total plant biomass yield of 23,000 kg/ha the stem portion removed as fiber consists of 59% leaving the tops - 11%, leaves - 15% and roots - 15% to be recycled as organic matter into the soil (Graph 16.3 above and 18.2 pg. 13). With the exception of phosphorus, more tan half of the nutrient uptake to grow a crop of hemp is returned to the soil in organic form (N = 69%, P = 33%, K = 53%, Mg = 72 % and Ca = 72%). See Graph 16.2 below.

Hemp Nutrient Composition

Assuming a total plant biomass yield of 23,000 kg/ha the stem portion removed as fiber consists of 59% leaving the tops - 11%, leaves - 15% and roots - 15% to be recycled as organic matter into the soil (Graph 16.3 above and 18.2 pg. 13). With the exception of phosphorus, more tan half of the nutrient uptake to grow a crop of hemp is returned to the soil in organic form (N = 69%, P = 33%, K = 53%, Mg = 72 % and Ca = 72%). See Graph 16.2 above.

17. RELATIONSHIPS BETWEEN STEM LENGTH, DIAMETER AND PLANT DENSITY

The stem diameter decreases as plant density increases. Stem diameters were about 4.5 mm at 200 plants/M² and 10 mm at 80 plants/M² with a -68% correlation Graph 17.1 below.

Correlation of Stem Diameter (mm) to Number of Stems/M²

The stem diameter decreases as plant density increases. Stem diameters were about 4.5 mm at 200 plants/M² and 10 mm at 80 plants/M² with a -68% correlation Graph 17.1 above.

There was a 95% correlation between stem diameters and stem length, 4 mm stems were 1.5 mm long and 9 mm stems = 2.3 m in length Graph 17.2 below. Stems increase in length as they increase in diameter.

Correlation Between Diameter (mm) and Length of Stem (m)

There was a 95% correlation between stem diameters and stem length, 4 mm stems were 1.5 mm long and 9 mm stems = 2.3 m in length Graph 17.2 above. Stems increase in length as they increase in diameter.

The total dry matter of retted stems increased as stem diameters increased (98% correlation) and total fiber dry matter yield increased as stem diameters increased (98% correlation) Graph 17.3 below.

Correlation Between Stem Diameter Total Stem and Fiber Dry Matter

The total dry matter of retted stems increased as stem diameters increased (98% correlation) and total fiber dry matter yield increased as stem diameters increased (98% correlation) Graph 17.3 above.

Next click here for suite Stem Diameter and Biomass...

Do you know more about this? E-mail us at Matthew@HempWorld.com

*Industrial-Hemp has no psychoactive properties following definition of the European Economic Community (EEC); THC content is less than 0.3%. In general, low THC-seed varieties without psychoactive properties are those that have a THC content of less than 1%. (See also No-THC Hemp-seed.) THC= Delta-9 TetraHydroCannabinol.