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KEY STUDIES
 
 
KEY FINDINGS OF FORESTRY RESEARCH IN THE LAST FIVE YEARS

High yielding phenotypes of Casuarina equisetifolia

In Casuarina equisetifolia, 79 female plus trees were selected after intensive genetic combing in the state to form clonal seed orchards at Neyveli during 1986. From the 79 plus trees 6 superior female trees were identified and selected. The performance of these 6 female trees was assessed at two research centers and also in farmer’s field. It was found that female tree No. 20 was performing very well followed by female tree No. 71 and 176. The volume gained by Tree No. 20 was 30% higher than the other trees.

Recommendation
Therefore propagules of the female trees clone No. 20, 71 and 176 are recommended for any further planting program.
SANDAL RAISING TECHNOLOGY IN DIFFERENT HOST SPECIES
Sandal with stylo scabra
The experiment has been taken up to find out the techniques of raising of Sandal plantations under rain-fed conditions, through broadcasting of sandal seeds with appropriate host that could be of fodder value and also could grow under rain-fed conditions. Some non-conventional host species such as Stylo scabra, Ordinary grass, Cajanus cajans, Sorghum vulgare, Casuarina junghuniana, Manihot esculents (Tapioca), Moringa oliefera (Annual drumstick), Desmanthus varigatus (Velimasal), Muntanjea calabra (Singapore cherry were tried.
 
The following hosts are found to be best for these locations.
1 Seshanchavady Stylo scabra, Casuarina junghuniana
2 Lokkur C. junghuniana, Stylo scabra
3 Kurumbapatti C. junghuniana, Moringa olifera
4 Gobachamdram Stylo scabra, Cajanus
5 Ramanahalli Sorgum vulgare, Stylo scabra
6 SFRI, Vandalur Stylo scabra, Casuarina junghuniana
  STUDY ON PHYTO-REMEDIATION
SELECTION OF SPECIES FOR SEWAGE WATER RECLAMATION
In the year 1999-2000 about 39 economically important species including Bamboo and Canes were chosen based on their efficiency in problem soils and planted for finding out the most suitable species that could perform better when sewage water was used for irrigation. They were planted at 3x3m espacement in 1m3 pits along with bio nutrients and bio fertilizers.
Recommendation
The following species were recommended for growing, under sewage water for ensuring mitigation of malady and also to get assured economic gains.
S No Species Name S No Species Name
1 Thespesia populnea 12 Bambusa mukulba
2 Acacia auriculiformis 13 Bassia latifolia
3 Casuarina junghullniana 14 Terminalia arjuna
4 Bambusa nutans 15 Cassia siamea
5 Albizia lebbeck 16 Derris indica
6 Dalbergia latifolia 17 Holoptelia integrifolia
7 Dalbergia sissoo 18 Casuarina equisetifolia
8 Eucalyptus melaluca 19 Terminalia bellarica
9 Bambusa nutans 20 Hopia parviflora
10 Leuceana leucocephala 21 Grevellia robusta
11 Albizia richardiana 22 Eucalyptus tereticornis(ITC 3)
IDENTIFICATION OF SUITABLE FAST GROWING TREE SPECIES IN TANNERY POLLUTED SOILS
This experiment was conducted to identify the suitable tree species that can be successfully grown in tannery-polluted soils . The species namely Cassia fistula, Derris indica, Acacia leucophloea, Eucalyptus hybrid, Melia dubia, Bamboo, Tecomella undulata, Samanea saman, Acacia suma, Caesalpinia coriaria, Bassia latifolia, Wrightia tinctoria, Alangium lamarckii, Hardwickia binnata, Terminalia arjuna, Morinda tinctoria and Syzygium cuminii were tried in 2 x 2m espacement.
S No RSL Factory

Common efluent treatment plant, Dindigul

1 Samania saman
Acacia suma
2 Acacia nilotica Samanea saman
3 Syzygium cuminii Eucalyptus tereticornis
4 Bassia latifolia Bambusa bamboo
5 Derris indica  
6 Cassia siamea  
7 Hardwickia binnata  
8 Inga dulce  
The above listed species are recommended for tannery effluent soils.
   
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