---

作 者 ：华珞,韦东普,白玲玉,姚允寅

期 刊 ：生态学报 2001年 21卷 4期 页码：588~592

关键词：氮肥；锌肥；硒肥；配合施肥；生物固氮；氮的转移；

Keywords:Nitrogen fertilizer, Zinc fertilizer, Selenium fertilizer, combined application fertilizer, nitrogen fixation, transfer of nitrogen fixed.,

摘 要 ：在湖北省宜昌县百里荒草场山地黄棕壤上配合施用氮锌硒肥 ,研究其对混播白三叶、混播黑麦草及单播黑麦草的干重及混播白三叶的固氮作用和氮转移的影响。试验结果表明 :1氮锌硒肥配合施用 ,混播黑麦草的干重均高于相应处理的单播黑麦草 ,混播牧草和单播黑麦草干重最高的处理都是 N4 6Zn0 Se5,其干重分别为 2 5.38g/盆和 1 9.93g/盆。 2施氮对混播白三叶、混播黑麦草及单播黑麦草的生长有明显的促进作用 ,施锌、硒对混播白三叶、混播黑麦草及单播黑麦草的生长作用不明显。 3混播白三叶氮素的主要来源是固氮作用 ,占全氮产量的 57.60 0 %～ 77.2 58%。 4混播白三叶固定氮的转移量只占混播黑麦草的全氮产量的 0 .31 6%～ 1 2 .2 51 % ,通过正交方差分析发现 ,适量氮肥 ( N30 mg/ kg)促进固定氮的转移 ,高量氮肥 ( N4 6mg/ kg)抑制固定氮的转移。

Abstract:A pot experiment was carried out to study the effects of combined applications of nitrogen, zinc and selenium fertilizer on dry weight of herbage, nitrogen fixation and transfer of nitrogen from white clover to ryegrass in mixed culture in a mountain yellowbrown soil. The results showed as follows: (1) Dry weight of ryegrass in mixed culture was higher than that of ryegrass in mono culture; Dry weight of both herbage in mixed culture and ryegrass in mono culture in treatment of N46Zn0Se5 were the highest, w...

---