施氮量对两种类型燕麦物质积累和产量的影响

Effects of Nitrogen Application Amount on Matter Accumulation and Yield of Two Types Oats

以皮燕麦白燕7号和裸燕麦白燕2号为材料,连续两年各四茬原位氮肥处理,研究了不同施氮量(0、30、60、90和120kg/hm^2)对两种类型燕麦物质积累、产量和产量构成的影响。结果表明,第一年第一茬两类燕麦干物质积累、产量等性状在不同氮肥处理间没有显著差异或明显的规律性,即使不施氮处理,燕麦产量并没有降低。从第二茬开始的后三茬中,不施氮和低氮处理的草产量、子粒产量和产量构成因素等明显降低,在低氮肥处理有随施氮量增加而增加的趋势。子粒产量在施氮量90kg/ hm^2处理达到最高,但高施氮量处理间差异不显著。两种类型燕麦品种表现一致。

The experiment with different fertilizer levels were carried out on husk oat ＂Baiyan 7＂ and naked oats ＂Baiyan 2＂ to investigate effects of nitrogen （N） application amount on dry matter accumulation and yield. This test adopted fertilizer amount was 0,30,60,90 and 120 kg/hm^2 and the two types＇oats were planted in same plots for four harvests in two years by keeping same N treatment in-situ. The results indicated that the responses in dry matter accumulation, yield and yield components of the two types＇oats to N fertilizer had no significant differences or clear orderliness among N treatments in the first harvest, and the oats yield did not decrease in the zero N-fertilizer treatment. In the following three harvests, the grain yield, grass production and yield components decreased obviously at zero and low N application level, and increased with the increase of N application amount among the lower N treatments. The highest grain yield was obtained in the treatment of 90 kg/hm^2, whereas there did not exist significant difference among the higher N application treatments. The two cultivars behaved the same.