Soil Solarization

Solarization had a profound promotive effect on ginger growth by suppressing the weed population, and the effect lasted until harvest. Even though solarization substantially reduced weed population, its effect was less on sledges. Bulbostylis barbata, Cynadon dactylon, and Cyperus rotundus survived the solarization. Vilasini (1996) observed that soil solarization for 30 days combined with Trichoderma application could control the rhizome rot disease and increase the yield.

An increased growth response of ginger plants was observed as a result of solarization. Growth parameters such as height, number of leaves/plant, number of tillers, number of roots, leaf length, leaf breadth, and fresh weight of shoots and rhizomes were influenced by solarization. A significant increase in yield was obtained through solarization. Trichoderma incorporated + neem cake amended + 30 days solarized treatment gave the highest yield/plant (623.23 g) and also per plot (10,159.57 g), which was 53.6 percent more than that of control. The availability of N, P, and K was improved by solarization. The initial cost of solarization is comparatively high. An amount of Rs. 52,500 is required for solarizing ore ha of a ginger field. An additional profit generated from this technique was Rs. 40,136/ha/yr for 30 days solarization (Anaith et al., 2000) (see Figure 5.8).

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