| 不同钾钙水平对白三叶草和黑麦草产量与品质的影响 |
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| 引用本文： | 彭克勤,胡笃敬.不同钾钙水平对白三叶草和黑麦草产量与品质的影响[J].湖南农业大学学报(自然科学版),1992(3). |
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| 作者姓名： | 彭克勤 胡笃敬 |
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| 作者单位： | 湖南农学院基础科学部，湖南农学院基础科学部 长沙，410128，长沙，410128 |
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| 摘 要： | 运用溶液培养方法研究了不同钾、钙营养水平对白三叶草和多年生黑麦草产量和品质的影响及钾、钙含量间的相互关系。这两种牧草在完全无钾溶液中不能正常生长,溶液钾浓度从0.375～3.0mmol/L,多年生黑麦草干物质产量略有上升,而白三叶草产量没有显著变化,对粗蛋白质含量影响也不明显。表明外液钾浓度达0.375mmol/L就已满足两种牧草生理上的要求。完全无钙时,两种牧草干物质产量很低,白三叶草表现更明显,比0.4mmol·Ca/L处理的低30和以上,说明白三叶草对缺钙更敏感。白三叶草产量在钙浓度为1.0 mmol/L时最高,钙浓度0.4～2.5mmol/L,对多年生黑麦草产量和品质影响不明显。地上部钾含量与钾供应水平呈正相关,与外界钙浓度相关性很小;而钙含量与钾供应水平呈负相关,与钙供应水平呈正相关。
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| 关 键 词： | 牧草 植物矿质营养 钾离子 钙离子/白三叶草 多年生黑麦草 |
EFFECT OF POTASSIUM AND CALCIUM SUPPLY ON YIELD AND QUALITY OF WHITE CLOVER AND PERENNIAL RYEGRASS |
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| Peng Keqin,Hu Dujing,.EFFECT OF POTASSIUM AND CALCIUM SUPPLY ON YIELD AND QUALITY OF WHITE CLOVER AND PERENNIAL RYEGRASS[J].Journal of Hunan Agricultural University,1992(3). |
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| Authors: | Peng Keqin Hu Dujing |
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| Abstract: | Effect of potassium and calcium supply on yield and quality ofwhite clover and perennial ryegrass was investigated using solution culture. Bothcrops could not grow for 7 weeks long in K free solution. The yield of peren-nial ryegrass slightly increased with increasing K in solution from 0.375~3.0mmol/L, the dry matter production of white clover showed no obvious variation,and the effect of K supply on crude protein content was also not significant. Theresults indicated that the physiological requirment of K by these plants could besatisfied as K concentration in solution reached 0.375 mmol/L. The dry matteryields were rather low when no Ca was supplied, and compared with peren-nial ryegrass, white clover was more sensitive to Ca deficiency. The maximumdry matter production of white clover was obtained in 1.0 mmol Ca/L treatment.The change of Ca concentrations from 0.4 to 2.5 mmol/L had no significant in-fluences on yield and quality of perennial ryegrass. Potassium contents in shootsof the two species were positively correlated with K supply levels and not corre-lated with Ca concentrations in media; Ca contents in shoots, however, werenegatively and positively correlated with K and Ca supply levels, respectively. |
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| Keywords: | grasses mineral nutrition potassium ion calcium ion/white clover perennial ryegrass |
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