五个紫云英地方品种比较试验

Comparative Study on Five Local Cultivars of Chinese Milk Vetch

在2008～2009年,调查了咸宁紫云英、余江大叶籽、信阳紫云英、安徽大叶青、丰城青秆籽5个品种的生长特性、植株养分、鲜草产量、鲜草所能提供的养分含量和种子产量,以筛选出与湖北省早稻配合种植较好的绿肥品种。结果表明,5个品种紫云英茎、叶特征类似,叶色和叶形略有差异;盛花期信阳紫云英和安徽大叶青较早,丰城青秆籽最迟;信阳紫云英和安徽大叶青鲜草产量较低,分别为27667kg/hm2和28117kg/hm2,显著低于丰城青秆籽(40000kg/hm2)和余江大叶籽(42100kg/hm2),但信阳紫云英种子产量(340.0kg/hm2)较高;各品种鲜草所含的氮、磷、钾养分总和为279.3～351.5kg/hm2,其中余江大叶籽最高,达351.5kg/hm2,显著高于信阳紫云英(279.3kg/hm2)。结合各个品种特征,可以认为余江大叶籽、咸宁紫云英及丰城青秆籽作为早稻绿肥效果比信阳紫云英和安徽大叶青更好。

The growth properties, content of plant N, P and K, yield of fresh plant and seed of five local cultivars of Chinese milk vetch （Cv. Xianning, Cv. Yujiang, Cv. Xinyang, Cv. Anhui and Cv. Fengeheng） as the green manure for earlyseason rice in Hubei province were compared. The results showed that the properties of stem and leaf of five cuhivars were similar except the color and shape of leaf. The full-blooming stage of Cv. Xinyang and Cv. Anhui were earlier than that of other three euhivars. The yield of fresh plant of Cv. Xinyang and Cv. Yujiang were 27 667 kg/hm^2 and 28 117 kg/hm^2 which were significant lower than that of Cv. Fengcheng （40 000 kg/hm^2）and Cv. Yujiang （42 100 kg/hm^2）.However, the seed yield of Cv. Yujiang （340.0 kg/hm2） was the second among the five cultivars. The sum of plant N,P,K of five cultivars ranged from 279.3 to 351.5 kg/hm^2, meanwhile Cv. Yujiang had highest nutrition of 351.5 kg/hm^2, which significant higher than that of Cv. Xinyang. In conclusion, Cv.Yujiang, Cv. Xianning and Cv. Fengcheng as the green manure for early-season rice were better than that of other two cuhivars.