聚γ-谷氨酸增效复合肥对油菜产量及其构成因素的影响

Effect of A Strengthened Compound Fertilizer by Poly-γ-glutamic Acid on the Yield and Its Components of Rapeseed (Brassica napus L.)

为探讨聚γ-谷氨酸增效复合肥对油菜产量及其构成因素的影响,在湖北省油菜主产区不同农田生态条件(棉花茬和水稻茬)下,采用大田推广品种,于2008～2009年度进行了大田对比试验。结果表明,施用聚γ-谷氨酸增效复合肥比习惯施肥提高油菜产量达5.7%～11.5%,比普通复合肥提高油菜产量3.3%～7.8%,其中分基肥和薹肥两次施用的增产幅度大于作基肥一次性施用的。聚γ-谷氨酸增效复合肥增产的原因主要是增加了单株角果数,改善了植株农艺性状和经济性状。

In order to make it clear of the effect of a strenghtened compound fertilizer（SCF） by poly-γ-glutamic acid on the yield and its components of rapeseed, a field comparison experiment was conducted in the main production area of Hubei province, under two different crop stubble conditions of cotton and rice in 2008-2009. The result showed that, applying SCF increased the rapeseed yield by 5.7%～11.5% comparing to the traditional applying of fertilizer （TAF） and 3.3%～7.8% comparing to the applying of conventional compound fertilizer （CCF）. Twice applying before the seedlings transplanted and at the elongation stage had a better yield enhancing effect than applying once at the first time only. The main reason of yield increasing is the enlargement of the numbers of pods per plant and the improvement of the agronomic and economic charecteristics of the plant. Therefore, it is concluded that SCF has the positive prospect of massive application in rapeseed production.