High-yield method for fish-lotus polyculture in grid ponds

The grid pond fish-lotus polyculture technique involves partitioning a hardened lotus pond into small grids of 2 sq m to 4 sq m using roof tiles, hard boards, etc., and planting lotus within the grids. The average yield per mu of water surface is 0.5 wan kg of lotus root and 400 kg to 450 kg of fish, with a net benefit of over 10,000 yuan per mu. This technique can utilize waste pits, wasteland, river beach land, and scattered marginal land to build grid ponds for fish-lotus polyculture. It features small investment, low cost, quick results, and high efficiency, making it suitable for vigorous development by thousands of rural households. It can both increase economic income and improve market supply, enriching the vegetable baskets of urban and rural residents, thus having very broad prospects for promotion.

I. Technical principle: Dividing the lotus pond into several small grids greatly increases the hard wall area within the pond. Since lotus root formation occurs when the lotus rhizome hits a hard wall and begins to swell and accumulate nutrients, the greatly increased hard wall area naturally leads to increased lotus root yield.

II. Pond conditions and infrastructure

1. Selection of lotus pond: Wasteland, waterlogged lowland, abandoned kiln pits, and old lotus ponds both inside and outside the village can all be utilized. As far as possible, choose locations with convenient transportation, good water source conditions, unpolluted water quality, convenient irrigation and drainage, and no tall buildings or shade structures around for building the lotus pond.