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黄骅市地处渤海西岸,黑龙港流域的最东端,土壤盐碱,含盐量一般在0.2—0.6%,pH值7.5—8.2,呈“少氮、贫磷、富钾”的特点。浅层地下水矿化度高,含盐量大于1.5克/升,年降水量560毫米左右,属温带大陆性季风气候,是典型的干旱半干旱农业生产区。种植粮、棉、油作物因自然条件限制产量低,效益差。苜蓿是一种多年生豆科草本植物。它富含多种营养成分,特别是粗蛋白含量在18—26%,是家禽、家畜的主要优质饲料。苜蓿根系发达,主根可入土3—6米,侧根分布在土壤20—30厘米土层内,故有抗旱和防
Huanghua is located in the west coast of the Bohai Sea and the easternmost part of the Heilongjiang River Basin. Its salinity and soil salinity are generally 0.2-0.6% with a pH value of 7.5-8.2, which is characterized by “less nitrogen, phosphorus and potassium” . Shallow groundwater with high salinity, salinity greater than 1.5 g / l, annual rainfall of about 560 mm, is a temperate continental monsoon climate, is a typical arid and semi-arid agricultural production area. Planting grain, cotton, oil crops due to natural conditions, low output, poor efficiency. Alfalfa is a perennial leguminous herb. It is rich in a variety of nutrients, especially crude protein content of 18-26%, is poultry, livestock, the main high-quality feed. Alfalfa roots developed, the main root can be buried 3-6 meters, lateral root distribution in the soil 20-30 cm soil, it is drought and anti