| 底墒与磷肥互作对春小麦产量形成的影响 |
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| 引用本文： | 李凤民,刘小兰,王俊.底墒与磷肥互作对春小麦产量形成的影响[J].生态学报,2001,21(11):1941-1946. |
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| 作者姓名： | 李凤民 刘小兰 王俊 |
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| 作者单位： | 李凤民（兰州大学干旱农业生态国家重点实验室,兰州,730000）
刘小兰（兰州大学干旱农业生态国家重点实验室,兰州,730000）
王俊（兰州大学干旱农业生态国家重点实验室,兰州,730000） |
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| 基金项目： | 国家重点基础研究发展规划资助项日(No.2000018603). |
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| 摘 要： | 研究了浇底墒水和施磷肥对春小麦产量形成的影响.实验设4个处理对照(CK);耕作层施磷(P);浇30 nm底墒水(W);施磷加浇30mm底墒水(PW).测定土壤含水量、根系生物量、地上生物量和测产等.结果表明,WP处理根重和中下层分配比例均较高.与W处理相比,WP处理利用底墒并没有增加,但水分利用效率和产量均增加.决定产量的主要因素是小麦早期小穗和小花形成的数量和质量.W和WP两个浇底墒水的处理,其土壤水分利用量平均为34.6 mm,略高于所浇的底墒水的量(30 mm).CK、P、W、WP等4个处理的籽粒产量分别为91 7.7,1191.1,2516.5,2734.1 kg/hrm2,水分利用效率分别为0.186,0.192,0.172,0.207 g/(mm.m2).
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| 关 键 词： | 春小麦 底墒 磷肥 水分利用效率 形成产量 根系 |
| 文章编号： | 1000-0933(2001)11-1941-06 |
| 收稿时间： | 9/7/1999 12:00:00 AM |
| 修稿时间： | 2001/3/10 0:00:00 |
Effects of pre-sowing irrigation and P fertilization on spring wheat yield information |
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| LI Fengmin,LIU Xiaolan and WANG Jun.Effects of pre-sowing irrigation and P fertilization on spring wheat yield information[J].Acta Ecologica Sinica,2001,21(11):1941-1946. |
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| Authors: | LI Fengmin LIU Xiaolan and WANG Jun |
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| Abstract: | This paper investigated the effect of pre\|sowing irrigation and phosphorus fertilizer supply on grain yield formation. Four treatments were employed: CK was as a control, P was phosphorus fertilizer applied in cultivated soil layer, W was pre\|sowing irrigation with 30 mm water depth, WP was W plus P. Soil moisture, root and shoot biomass, and grain yield were measured in the given periods. The root biomass and its distribution in medium and down soil layers in WP treatment were higher than others. Compar... |
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| Keywords: | spring wheat pre\|sowing soil moisture phosphorus water use efficiency grain yield root system |
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