Standar Pengamatan Varietas pada Tanaman Tebu (Saccharum officinarum)

 FIELD OBSERVATION CRITERIA FOR SUGAR CANE

1.  Perkecambahan (Germination)

Scale	Criteria	Percentage
1 2 3 4 5 6 7 8 9	Sangat bagus  (very good) Bagus (good) Sedang (medium) Jelek (bad) Sangat jelek (very bad)	> 90 - 100 > 80 - 90 > 70 - 80 > 60 - 70 < 60

2. Anakan (Tillering Ability)

Scale	Criteria	Jml anakan/rumpun (Tillering ability)
1 2 3 4 5 6 7 8 9	Sangat banyak (planty) Banyak (Many) Sedang (medium) Sedikit (few) Sangat sedikit (very few)	8 – 9 6 – 7 4 – 5 2 – 3 1

3 . Populasi (Population)

Scale	Criteria	Jml. batang / meter (No of Stalk  /meter)
1 2 3 4 5 6 7 8 9	Sangat tinggi (very high) Tinggi (high) Sedang (medium) Rendah (low) Sangat rendah (very low)	> 12 10 – 12 8 – 10 6 – 8 < 6

4. Diameter Batang (Stalk Diameter)

Scale	Criteria	Diameter stalk (mm)
1 2 3 4 5 6 7 8 9	Sangat besar (very big) Besar (big) Sedang (medium) Kecil (litle) Sangat kecil (very litle)	> 35 > 25 -  35 > 20 - 25 > 7.5 - 20  < 7.5

5. Penggabusan Batang (Pith)

Scale (Top, Midlle, Base)	Criteria
No Pith	0
< 1/5 part of stalk radius 1/5 part of stalk radius > 1/5 part of stalk radius	1- 1 1+
< 2/5 part of stalk radius 2/5 part of stalk radius > 2/5 part of stalk radius	2- 2 2+
< 3/5 part of stalk radius 3/5 part of stalk radius > 3/5 part of stalk radius	3- 3 3+
< 4/5 part of stalk radius 4/5 part of stalk radius > 4/5 part of stalk radius	4- 4 4+
< 5/5 part of stalk radius 5/5 part of stalk radius > 5/5 part of stalk radius	5- 5 5+

6. Lubang (Pipe tube)

Scale ( Top, Midlle, Base)	Criteria
No Pipe	0
< 1/5 part of stalk radius 1/5 part of stalk radius > 1/5 part of stalk radius	1- 1 1+
< 2/5 part of stalk radius 2/5 part of stalk radius > 2/5 part of stalk radius	2- 2 2+
< 3/5 part of stalk radius 3/5 part of stalk radius > 3/5 part of stalk radius	3- 3 3+
< 4/5 part of stalk radius 4/5 part of stalk radius > 4/5 part of stalk radius	4- 4 4+
< 5/5 part of stalk radius 5/5 part of stalk radius > 5/5 part of stalk radius	5- 5 5+

7. Tinggi Batang (Length of stalk)

Scale	Criteria	Length of stalk (cm)
1 2 3 4 5 6 7 8 9	Sangat tinggi (very long) Tinggi (long) Sedang (medium) Pendek (short) Sangat pendek (very short)	> 350 > 300 – 350 > 250 – 300 > 150 - 250 < 150

8. Sogolan (water shoot / bull shoot)

Scale	Criteria	Jumlah sogolan / meter (No of water shoot / meter)
1 2 3 4 5 6 7 8 9	Sangat Sedikit(very few) Serdikit (few) Sedang (medium) Banyak (many) Sanggat Banyak (planty)	0 - 1 2 - 3 4 - 5 6 - 7 .> 8

Note : Pengamatan sogolan dilakukan umur 9 bulan (Observation start nine month age).

9. Siwilan (Side Shoot)

Scale	Criteria	Jml. Siwilan / batang (No of side shoot / stalk)
1 2 3 4 5 6 7 8 9	Tanpa (zero) Sedikit (few) Sedang (medium) Banyak (many) Sangat Banyak (planty)	0 1 – 2 3 - 4 5 – 6 > 6

Note : Siwilan yang disebabkan oleh borer tidak dihitung (Side shoot caused by borer not include)  

       

10. Akar gantung (Side Root)

Skala	Criteria	Jml. Ruas yang berakar / batang (No of internode have side root / stalk)
1 2 3 4 5 6 7 8 9	Sangat Sedikit (very few) Sedikit (few) Sedang (medium) Banyak (Many) Sangat Banyak (planty)	0 1 - 2 3 - 4 5 - 6 > 6

11. Batang mati (dead stalk)

Skala	Criteria	Percentage
1 2 3 4 5 6 7 8 9	Sanggat sedikit (very few) Sedikit (few) Sedang (medium) Banyak (Many) Sangat Banyak (planty)	< 3 3 - 7 8 - 10 11 - 15 > 15

Note : Panjang sample minimal 10 meter (minimal sample with in 10 meter)

12.  Derajat Kerobohan (Lodging degree)

Scale	Criteria	degree
1 2 3 4 5 6 7 8 9	Tegak (Erect) Agak condong (rather incline) Condong ( incline ) Roboh ( Lodging) Sangat roboh (Very Lodging)	0 - 15 > 15 - 35 > 35 - 55 > 55 - 75 > 75 - 90

13. Persentase Kerobohan (Lodging percentage)

Skala	Criteria	percentage
1 2 3 4 5 6 7 8 9	Sangat Sedikit  (very few) Sedikit (few) Sedang (medium) Banyak (Many) Sangat Banyak (planty)	< 5 % 5 – 10 10 – 15 15 – 20 > 20

Note :Tebu roboh adalah tebu yang miring > 50 derajat (Lodging is sugar cane lodge > 50 degree

      

14. Pembungaan (Flowering)

Scale	Criteria	Percentage
0 1 2 3 4 5 6 7 8 9	Tidak berbunga (No flower) Sangat Sedikit (very few) Sedikit (few) Sedang (medium) Banyak (many) Sangat banyak (planty)	0 < 5 > 5 - 20 > 20 - 40 > 40 – 80 >80

15. Kebersihan Daun (Leaf Deseases)

Scale	Criteria	Percentage of desease Symptom
0 1 2 3 4 5 6 7 8 9	Tidak ada penyakit (No Desease) Sangat Bersih (very clean) Bersih (clean) Sedang (medium) Kotor (dirty) Sangat kotor (very dirty)	0 < 5 > 5 - 20 > 20 - 40 > 40 – 80 >80

Note : Daun kotor akibat serangan penyakit (Leaf Dirty causes by deseases symptom)

16. Retakan tumbuh (Number of crack internode)

Scale	Criteria	Jumlah ruas retak/btg (No of internode crack / stalk)
1 2 3 4 5 6 7 8 9	Sangat sedikit (very few) Sedikit (few) Sedang (medium) Banyak (Many) Sangat Banyak (planty)	0 1 – 2 3 - 4 5 – 6 > 6

17. Sifat Penggulungan Daun (Characters of rolling leaf)

Skala	Criteria
0 1	Tidak menggulung (No Rolling leaf) Menggulung (Rolling )

Note : Diamati pada saat matahari terik/Observe when sunny

18. Vigor Tanaman (Overall vigor of growing)

Scale	Agronomic Performance
1 2 3 4 5 6 7 8 9	Sangat Bagus  (Very good) Bagus (good) Sedang (medium) Jelek (bad) Sangat Jelek (very bad)

19. Kualitas (Quality)

Scale	Criteria	% Brix	% Pol	% Rendement
1 2 3 4 5 6 7 8 9	Sangat tinggi (very high) Tinggi (high) Sedang (medium) Rendah (low) Sangat rendah (very low)	> 22 20 – 22 18 – 20 16 – 18 < 16	> 18 > 16 - 18 >14 - 18 > 12 - 14 < 12	> 8.5 > 7.5 - 8.5 > 6.5 - 7.5 > 5.5 - 6.5 < 4

20. Ton Cane per Hektar  (TCH)

Skala	Criteria	TCH
1 2 3 4 5 6 7 8 9	Sangat tinggi (very high) Tinggi (high) Sedang (medium) Rendah (low) Sangat rendah (very low)	> 110 > 90 - 110 > 70 - 90 > 50 - 70 < 50

21. Sifat Pengelentekan Daun (Characters of  Detrashing)

Skala	Criteria
0 1	Mengelentek sendiri (Self Detrashing) Tidak mengelentek (No Detrashing)`