In many regions of our country, the large population leads to a surplus of labor that is difficult to reassign, and rural economies often develop at a slow pace. Revitalizing local economies, making rational use of land resources, and optimizing labor force utilization are key strategies for promoting rural economic growth. The triple-crop cultivation model has proven to be highly effective in increasing per-unit-area output, making it a promising approach worth further promotion. **Analysis of the Benefits of the Strawberry, Big Greens, and Cantaloupe Triple-Crop Model** In recent years, the successful cultivation of strawberries, big greens, and melons in the Luohe area of Henan Province has demonstrated the potential of this model. In Linyi, the triple-crop method was introduced in 2000, and it yielded significant economic benefits. On average, each mu (approx. 667 square meters) produces 3,000 kg of strawberries, valued at around 12,000 yuan. Each mu also yields 2,000 kg of melon, generating 4,000 yuan, and 1,000 kg of big greens, contributing 500 yuan. Altogether, the annual output value reaches approximately 16,500 yuan per mu. **Cultivation Techniques for the Second and Third Crops** 1. **Breed Selection**: The choice of varieties depends on fertility characteristics, flowering bud differentiation time, and market demand. For strawberries, short dormancy varieties are preferred. For big greens, leafy vegetables such as Shanghai green, parsley, and spinach are selected. For melons, light-skinned varieties like Guxiang are commonly used. 2. **Planting Methods and Layout** - **Strawberry Cultivation**: Greenhouse early-maturing planting should begin in late August or early September. Basal fertilizer includes fully decomposed organic manure (5,000–8,000 kg per acre), inorganic compound fertilizer (40–50 kg), and 200 kg of cake fertilizer. After mixing with a rotary tiller, raised beds are formed, typically 15–20 cm high, 40–50 cm wide, and spaced 90–110 cm apart. Drip irrigation systems allow for wider beds, while non-drip systems require narrower ones. - **Big Greens Planting**: After strawberries are established, water is applied, and seeds are sown directly on the ground. A thin layer of soil is then added. When the plants have two true leaves, another watering is done without adding fertilizer. - **Cantaloupe Cultivation**: In early February, seedlings are planted in pots and placed into trenches. Agricultural film is used to regulate temperature and humidity. When planted between strawberry rows, the distance is kept at 40 cm. At this stage, strawberries are in their peak production phase, while melons are still young, so they do not interfere with each other. 3. **Field Management** - **Strawberry Care**: Throughout the growing season, old leaves should be regularly removed. If sufficient basal fertilizer is used, no additional fertilizer is needed for the first harvest. Once the fruit reaches finger size, 5 kg of NPK compound fertilizer can be applied per 50 square meters before flowering. Foliar sprays with multiple micronutrients are recommended. Temperature control follows a gradual decrease: 28–32°C during the early stages, 25–28°C during budding, 22–25°C during flowering, and 18–23°C during fruit development. Night temperatures should not drop below 5°C. High temperatures during flowering (over 30°C) can damage flowers, so cooling measures are necessary. Excessive humidity can reduce pollination and lead to deformed fruits and gray mold. Watering should be done carefully, especially during sunny days, and ventilation should be increased to reduce moisture levels. - **Big Greens Maintenance**: Keep the soil consistently moist, apply two rounds of fertilizer, and harvest when the plants have 4–6 leaves. Ensure timely cleaning when strawberries start blooming. - **Cantaloupe Management**: After planting, spray a solution of thiophanate-methyl and potassium dihydrogen phosphate. When the vines have 5–6 leaves, tie them up and spray every 10 days. Prune excess vines and remove those beyond 15 nodes. During flowering, ensure proper pollination and thin out fruits to one per plant. Temperature management should align with the needs of strawberries, with daytime temperatures between 25–28°C and nighttime temperatures around 10°C. As the melons mature, increase daytime temperatures and reduce night-time watering to enhance fruit quality. 4. **Pest Control** - **Strawberry Gray Mold**: Use chlorothalonil aerosol or 100-speed fumigant. Before flowering, apply 65% dexamethasone WP at 500 times dilution or 50% speed Ke Ling at 800 times. - **Big Greens Pests**: Common pests include greenworms and aphids. Use 100% sulfuric acid solution or 500-times diluted hero. - **Cantaloupe Diseases**: For powdery mildew, use 7% thiophanate-methyl at 600–800 times or 40% polyphosphoric acid suspension at 800 times. For downy mildew, use 72% mildewine disease net at 800–1000 times or 58% formazan Mn-Zn at 500 times. For root rot, apply agricultural streptomycin or thiophanate-methyl. By implementing this triple-crop system, farmers can significantly improve productivity and profitability while making efficient use of available land and labor. This model offers a sustainable and economically viable solution for rural development.

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