

'^^Wr 



./".#" 



rst^ 



-•: 



s8H.*r 





FIGURE 23. Same site as that in Figures 21 and 22 just after planting 

 Puccinellia in interior and Halimione on the perimeter of 

 area, May 1981. 



Nursery Plantings 



It was obvious from our initial visit to lie Grande that 

 transplant sources could become exhausted as we began scaling up the 

 planting operation. With rehabilitation of larger areas as a goal, we 

 explored the possibility of establishing nursery areas for two of the 

 most promising species, Puccinellia and Halimione . The Puccinellia 

 nursery area was established at Kerlavos in May 1979 in conjunction 

 with a type of transplant and fertilizer materials experiment. The 

 nursery area for Halimione was incorporated into a fertilizer materials 

 experiment with three other species at lie Grande in May 1980. Both 

 areas were refertilized with Mag Amp + Osmocote to determine the effect 

 of fertilizer in addition to that applied at planting (Fig. 24). A 

 limited number of transplants were taken from each nursery area in May 

 1981 and compared with transplants of the same species taken from the 

 natural marsh in experimental plantings at lie Grande. 



Another approach to the problem of transplant propagation was 

 undertaken in a joint venture with Monsieur Levasseur in 1981 . He took 

 Puccinellia plants from a natural marsh, transplanted them into small 

 plastic pots, and grew them in his garden in Rennes for several weeks 

 in the spring (Fig. 25). These transplants were planted in an 

 experimental plot at lie Grande in May 1981 to compare their growth 

 response with transplants taken from the natural marsh at the time of 

 planting (Fig. 26). 



379 



