播期与氮肥对燕麦种子产量构成要素的影响

以4个燕麦(Avena sativa)品种为试验材料,分析了播期与氮肥对其种子产量及其构成要素的影响。结果表明:播期与氮肥对不同燕麦品种种子产量及其构成要素均有显著影响。其中,4月下旬播种各燕麦品种的有效穗数、每穗粒数及千粒重均比4月中旬与5月上旬播种的高;虽然氮肥处理对燕麦产量及构成要素的影响程度因播期不同而异,但基本规律相同,即均随施氮量增加而增加,且各氮肥量处理间差异显著;施氮量相同时,氮肥分期施用效果较好。不同品种比较,各处理下皮燕麦种子产量均比裸燕麦高。

Effect of sowing date and nitrogen fertilizer on seed yield and its components of oats in alpine area

The effects of sowing date and nitrogen fertilizer on the seed yield and its components of 4 oat cultivars was studied. The results showed that the effect was significant. The effective tiller number, seed number per panicle and thousand grain weight were higher while sowed at late April than mid April and early May. The nitrogen fertilizer showed the same pattern and the difference among nitrogen fertilizer treatments was significant. Applying nitrogen fertilizer at separate time showed better effect under the same application rate. Covered oats had higher seed yield than naked oats.