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1982年,张家川县建立红豆草种子繁殖田145亩,其中较温暖湿润川区(降雨量600毫米以上)130亩,干旱山区(降雨量450—500毫米)零星15亩。亩下籽量均为10斤。根据两年多来生产情况观察,温暖湿润区每平方米有苗70—80株,在盛花期苗高1.5米,亩产草量前茬8000多斤,播种当年每株可形成0.6—1个繁殖枝,2—3年可形成4—8个繁殖枝和10个以上营养枝。由于株数过密,茎杆细嫩,盛花期至结实期发生倒伏,每亩只产种子17斤左右。干旱区山地,盛花期虽然苗高仅50—100厘米,株数40—60株,亩产草量4000多斤,但亩产籽量却达50—140斤。根据实践与外地经验,我们认为在红豆草种子生产中应注意以下几点:
In 1982, Zhangjiachuan established 145 mu of sapling seed breeding field, of which 130 mu are warmer and more humid areas (precipitation above 600 mm) and 15 mu scattered in arid mountainous areas (450-500 mm rainfall). The amount of seed under the acres are 10 pounds. According to the production of more than two years of observation, warm and humid areas per square meter seedlings 70-80, 1.5 meters in full bloom seedling height, mu yield of more than 8000 kilograms of grass, sowing that year can form 0.6-1 Breeding branches, 2-3 years to form 4-8 breeding branches and more than 10 vegetative branches. As the number of plants is too dense, delicate stems, flowering period to fruiting lodging occurred only about 17 pounds per acre seed. Although the seedling height is only 50-100 centimeters, the number of plants is 40-60, the yield per mu is more than 4,000 kilos, but the yield per mu is 50-140 kilos. According to the practice and field experience, we believe that in the production of sainfoin seeds should pay attention to the following points: