不灌溉条件下戈壁型伊犁蒿的产量动态及自身因子与相关性的研究

0 A Research on the Relation between Individual Factor and Forage Product of Gobi Type

采用单株测产法，在不灌溉条件下对戈壁型伊犁蒿的各生育期产量动态进行了研究，对构成产量的不同因子作了多元回归分析，并进行了营养成分分析和适口性调查。研究结果表明，戈壁型伊犁蒿在结实期的产量最高，单株鲜草量为２７５ｇ，公顷鲜草量达２０３６５．０５ｋｇ，公顷种子量达１０１８．３５ｋｇ，叶量占６２％，整个生育期叶量和叶面积对产量的贡献最大；在分枝期粗蛋白质含量为１９．９２％，开花期粗脂肪含量最高，为３．７３％；在冬、春、秋季适口性较好，各类家畜喜食。

his paper, by measuring individual production, deals with the production at different ages under non-irrigation condition and analyzes the nutrition components. It also analyzes different factors affecting the production in many aspects. According to the result, the highest production period is the seed producing period. In this period individual fresh production is 275g, total production per ha is 20365kg, seed production per ha is 1018kg, and leaf takes 62% of the total forage weight. During the whole period of growth, the amount of leaves affects the production most. During the period in which branches grow the plant reaches its highest protein content (19.92%). In blooming period, it reaches its richest oil content (3.73%). In winter, spring and autumn its nutrition value is suitable for domestic animals, especially for sheep.