摘要
啤酒大麦植株中的钼含量是种子＞叶＞根＞茎，除茎外均与施磷量呈显著曲线相关；而铁的含量是根＞叶＞茎＞籽，只有根及叶中的铁含量与施磷量呈显著曲线相关，但根中的铁含量随施磷量增加而增加。施大量磷肥会降低植株中的含铁量，铁主要集中在根部，当施P2O54．8g／盆时，叶中的含铁量比根低8．61倍，且叶中的P／Fe增大，达63—75倍，故呈现缺铁症。施磷（P2O5）2．4g／盆时，其体内各器官钼、铁含量最高，植株成熟时，钼、铁积累量分别为14．9μg／盆、3218μg／盆。种子中钼积累量最多，占总量的62．3％，而铁仅占总量的10．2％。施适量磷肥，能明显提高啤酒大麦的钼、铁含量及其产量和品质，增加千粒重、淀粉含量及降低粗蛋白质含量等。
Molydenum content in beer barley was found in kernel＞in leaves＞in roots＞in straw, and was significantly correlated to p-fenilization levels with an exception of stem (straw), while the magnitude of plant Fe content was in an order almost opposite to that of Mo. Root Fe increased with the increasing of P level, showing verysignificant correlation these two variables. Plant Fe obviously declined with too high P level (P2O5 4.6g/pot). Root Fe was 8.61 bines higher than that of leaf Fe, having the leaf P: Fe ratio hightened towards 63-75, causing chlorosis disorder. The highestMo and Fe content in plant parts observed in this study appeared at p-level of 2.4g P2O5 Per pot. .Mo and Fe accumulated in matured plant was 14.9 and 3218 μg/pot,respectively. Distribution rate of Mo was 62.3％ in kernel, but of Fe, was only 10.2％.Proper quantity of P-application was proved to be beneficial in crop yield and quality. There was evidence of the increment of 1000-seed weight final yield, and seed starch content also the decrease of crude protein.
出处
《土壤学报》
CAS
CSCD
北大核心
1997年第4期444-450,共7页
Acta Pedologica Sinica
关键词
大麦
磷肥
啤麦
钼
铁
产量
品质
P-fertilization level
Beer barley, Yield and quality, Mo and Fe
