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当前位置: 首页 > 文章 > 不同施N水平对黑麦草产量和品质的效应 江西农业大学学报 2003,25 (6) 42-45
Position: Home > Articles > Effects of Different N-Application Levels on Yield and Quality of Rye Grass Acta Agriculturae Universitatis Jiangxiensis 2003,25 (6) 42-45

不同施N水平对黑麦草产量和品质的效应

作  者：
刘经荣;张美良;郑群英;石庆华;王少先
单  位：
江西省农业科学院;江西农业大学
关键词：
黑麦草;施N水平;氮肥利用率;增产效益
摘  要：
在红壤岗地上进行黑麦草氮肥施用试验,采用2种施肥结构(单施化肥、沼肥+化肥)和4种施N水平(0,150,250,350kg/hm2)。结果证明:黑麦草的产量随施N水平的提高而增加,且草的N、P含量,亦随施N水平的提高而增加,从而改善了草的营养品质。在等N条件下单施化肥的增产效果优于沼肥+化肥。肥料N的利用率和单位N素的贡献,则随施N水平的提高而递减,但单位面积的利润则仍以高N水平为最大。考虑到沼肥成本可以不计,则两种施肥结构的经济效益较为接近,且沼肥的生态社会效益好,因此沼肥+化肥的高施N水平仍不失为一种可选用的施肥方式。
译  名：
Effects of Different N-Application Levels on Yield and Quality of Rye Grass
作  者：
LIU Jing-rong1, ZHANG Mei-liang1 ZHENG Qun-ying1, SHI Qing-hua1, WANG Shao-xian2(1.Jiangxi Agricultural University, Nanchang 330045, China;2.Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China )
关键词：
rye grass; level of N-fertilization; utilization rate of N-fertilizer; yield-growing effect
摘  要：
Different levels of N-fertilizers were applied to rye grass cultured in hilly red soil. Two experimental fertilization compositions as follows were set: 1. Chemical fertilizer only; 2. Chemical fertilizer + biogas-tank sludge. Each composition was conducted with 4 different N levels: 0,50,250,350 kg/hm2, respectively. The results showed that the yield of rye grass increased with the rise in the level or N-application. This also coincided with an increase in the N and P content in the forage, which showed that the nutrient quality of feed improved. With the equal N amount, the fertilization of "chemical fertilizer only" got higher yield of forage than the mixed fertilization of "chemical fertilizer + biogas-tank sludge". While the utilization ratio of N-fertilizer and the unit contribution ratio of Nitrogen decreased with the rise in N-fertilization, the heavier application of N amount tended to maximize the economic benefits from unit area. Since biogas-tank sludge was nearly costless, the economic effects of the two fertilization compositions are close. But with better ecological and social effects, the mixed fertilization of "chemical fertilizer + biogas-tank sludge" with heavier N amount is a good alternative.

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