[Effect of the Cultivation Pattern on Photosynthesis and Yield of Salvia miltiorrhiza].

OBJECTIVE

To investigate the effect of cultivation pattern on photosynthesis and yield of Salvia miltiorrhiza.

METHODS

The covering plastic mulch, the uncorering plastic mulch, and the traditional cultivation pattern were used to analysed. LI-6400 XT photosynthesis was used to determine the photosynthetic parameter of Salvia miltiorrhiza, and some growth indexes of Salvia militiorrhiza were measured,and the accumulation was measured.

RESULTS

The change of stomatal conductance in the plants of different treatments were as follows, the covering plastic mulch > the uncovering plastic mulch > the traditional cultivation pattern; the change of intercellular CO2 concentration in the plants of different treatments was as follows, the uncovering plastic mulch > the covering plastic mulch > the traditional cultivation pattern; the change of transpiration rates in the plants of different treatments was as follows, the covering plastic mulch> the uncovering plastic mulch > the traditional cultivation pattern; the change of net photosynthetic rates in the plants of different treatments was as follows, the covering plastic mulch > the uncovering plastic mulch > the traditional cultivation pattern. The change of fresh and dry weight in root of Salvia miltiorrhiza of different treatments was as follows, the covering plastic mulch > the uncovering plastic mulch > the traditional cultivation pattern. Compared to the uncovering plastic mulch and the traditional cultivation pattern, the fresh and dry weight in the root of Salvia miltiorrhiza of the covering plastic mulch were increased to 16. 62%,18. 20% and 14. 68%,48. 62%.

CONCLUSION

The cultivation pattern of covering plastic mulch reduced water stress by increasing the water content of soil to increase photosynthesis efficiency, thus increase the yield of Salvia miltiorrhiza.