| 摘要: |
| 以二棱皮大麦(Hordeum distichum L.)品种76-22和六棱裸大麦(H.haxastihum L.)品种矮杆齐为材料,并用四种不同氮肥水平为手段,研究了春大麦籽粒的氮素积累规律和含氮量变化规律,主要结果是单株籽粒氮素积累过程可用Logistic 方程模拟,进一步测验表明:同一品种的各处理间,籽粒氮素的相对积累迅速一致,而矮杆齐快于76-22。籽粒含氮量在籽粒发育初期较高,其后逐渐下降,至乳熟中、末期最低,随后又逐渐上升;如增施追肥量,籽粒含氮量也增加。硝酸还原酶活性的测定表明,76-22后期的吸肥能力明显低于矮杆齐,表明76-22籽粒氮素的来源主要依赖于抽穗前吸收同化氮素的再分配,而矮杆齐则较多地依赖于抽穗后的继续吸收同化。 |
| 关键词: 含氮量 籽粒发育 硝酸还原酶活性 籽粒积累 吸收同化 变化规律 氮素积累 氮素水平 积累规律 矮杆 |
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| Abstract: |
| The experiments,used two cultivars,malting barley 76-22(H.distich- um L.)and food barley Aiganqi(H.sub-haxastichum L.),and four ni- trogen levels,52.1,86.6,121.5 and 156.3 kg/ha.,were carried on field conditions in 1983 and 1984.The main results were as follows The nitro- gen accumulation processes in grains of all treatments could be simulated by Logistic equations,and the further test of the equations showed that, the relative rates of nitrogen accumulation in grains appeared no signi- ficant difference a... |
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