EFFECT OF SEED WEIGHT, AND SEED PHOSPHORUS AND NITROGEN CONCENTRATIONS ON THE EARLY GROWTH OF WHEAT SEEDLINGS
EFFECT OF SEED WEIGHT, AND SEED PHOSPHORUS AND NITROGEN CONCENTRATIONS ON THE EARLY GROWTH OF WHEAT SEEDLINGS
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DOI：
10.1071/ea9900545
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发表时间：
1990-01-01
影响因子：
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通讯作者：
DEMARCO, DG
中科院分区：
文献类型：
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作者：
DEMARCO, DG
从磷浓度为0.14%、0.17%和0.19%的3批小麦种子中选出重量均匀的种子，播种在不同施磷处理的土壤中。 种子磷浓度越高，出苗越快。播种后25天，在最高施磷浓度下生长的所有植物大小相似，但施磷浓度越低，从低磷或高磷浓度下饲养的2批种子中选择一系列重量等级，平均种子重量从1000克到1000克，28至58毫克，种子中的磷含量为0.13%至0.37%。 高磷处理的幼苗比低磷处理的幼苗具有更大的第一片叶、更高的干重和更长的根。 在每一批种子中，较重的种子会产生更大的叶子，更重的植物和更长的根。 如果考虑种子P含量（μ g P/种子）而不是单独考虑P百分比或种子重量，则批次之间的产量差异在很大程度上被解释。 种子氮浓度或含量的差异并不总是占幼苗生长的差异。
Wheat seeds of uniform weight selected from 3 batches of seed with phosphorus (P) concentrations of 0.14, 0.17 and 0.19% were sown in soil with a range of applied P treatments. Seedling emergence was more rapid the higher the seed P. By 25 days after sowing all plants grown at the highest concentration of applied P were similar in size, but with lower applied P, plants from seed with higher P concentrations had an advantage.A range of weight classes was selected from 2 batches of seed raised at low or high concentrations of P. There were 11 groups ranging in mean seed weight from 28 to 58 mg and in seed P from 0.13 to 0.37%. Seedlings from the high P batch had larger first leaves, a higher dry weight, and longer roots than those from the low P batch when grown in a highly P-deficient sand culture system. Within each batch, heavier seeds produced larger leaves, heavier plants and longer roots. The yield differences between batches were largely accounted for if the seed P content (mu-g P/seed) was considered rather than either percentage P or seed weight alone. Differences in seed nitrogen concentration or content did not consistently account for differences in seedling growth.