Mung bean sowing is highly flexible and serves as an excellent alternative crop for farmers. In the region along the Huaihe River, it can be broadcast as late as early August. Here are the improved cultivation techniques:
First, select early-maturing and high-yield varieties such as Green No. 4, Green No. 6, and Bright Green No. 3. These varieties are well-suited for the local climate and ensure good yields.
Second, apply base fertilizer. Although mung beans have nitrogen-fixing rhizobia, adding manure, phosphorus, and potassium significantly boosts yield. A product like Shinongjiafei can be applied once before planting and then incorporated into the soil after sowing. If applying base fertilizer is delayed, supplement with nitrogen and phosphate fertilizers during the branching and early flowering stages to enhance rhizobial activity and promote flower bud formation.
Third, aim to sow in the morning and ensure even distribution. In disaster-prone areas, try to sow as early as possible. If sowing is delayed, pre-soak the seeds in water before planting to improve germination. It's also important to maintain the proper seeding rate. Mung bean seeds often contain about 10% small, hard seeds that may not germinate well. Sieve the seeds before sowing. The typical sowing rate is 1.5 to 2 kg per mu, with a depth of 3 to 5 cm.
Fourth, implement effective field management practices:
1. Thinning and spacing: Remove weak seedlings when they reach the two-leaf stage. At the four-leaf stage, thin the plants to a spacing of 13–16 cm between plants and 40 cm between rows, leaving about 1 to 1.25 million seedlings per acre.
2. Weeding and soil cultivation: From emergence to flowering, perform at least four rounds of weeding. Start with shallow cultivation and gradually increase depth, then return to shallow as needed.
3. Irrigation and drainage: The flowering and pod-filling period is critical for water and nutrient uptake. Water promptly if drought occurs to keep the soil moist. However, this period often coincides with the rainy season, which can lead to excessive growth, flower drop, or plant death due to waterlogging. Drain excess water to ensure healthy plant development.
Fifth, use scientific storage methods. Before storing, expose the beans to sunlight to kill any pests. For large-scale storage, fumigate with 1.5 kg of sodium cyanide for 48 hours, achieving 100% insect control without affecting germination. For small quantities, soak the beans in boiling water for 20 minutes, dry them in the sun, and store them in sealed containers for long-term preservation.
These practices help maximize yield, reduce losses, and ensure quality mung bean production.
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