紫花苜蓿是一种宜于灌溉的牧草。喜水但忌积水,积水会导致烂根,造成植株大批死亡。因此,灌溉调控技术尤为重要。一、了解需水量1.苜蓿生长需要消耗大量的水分,每生产1 000克干苜蓿需水800克,其生长需要土壤含水量为60%～90%。2.各生育期需水量分别为:子叶出土至茎秆形成期,田间持水量保持80%为宜(偏湿);茎秆形成至初花期为70%～80%(偏湿);开花至种子成熟期为50%左右(半干);越冬期为40%。 Alfalfa is a suitable grass for irrigation. Hi water but avoid water, water will lead to rotten roots, resulting in a large number of plant deaths. Therefore, irrigation regulation and control technology is particularly important. First, understand the water demand 1. Alfalfa growth requires the consumption of large amounts of water, each production of 1,000 grams of dried clover water needs 800 grams, its growth requires soil moisture of 60% to 90%. The water requirement of each growth period was as follows: cotyledon unearthed to the stalk formation stage, the field water holding capacity of 80% is appropriate (partial wet); stem formation to early flowering of 70% to 80% (partial wet); flowering to Seed maturity is about 50% (semi-dry); wintering period is 40%.