Effect of calcium silicate on growth and dry matter yield of Chloris gayana and Sorghum sudanense under two soil water regimes
Effect of calcium silicate on growth and dry matter yield of Chloris gayana and Sorghum sudanense under two soil water regimes
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DOI：
10.1111/j.1365-2494.2005.00491.x
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发表时间：
2005-12-01
影响因子：
2.4
通讯作者：
Tsuji, W
中科院分区：
文献类型：
--
作者：
Eneji, E;Inanaga, S;Tsuji, W
通过盆栽试验，研究了0(对照)、1 mg ha(-1)、2 mg ha(-1)、4 mg ha(-1)和6 mg ha(-1)5种浓度的硅酸钙在干湿土壤水分条件下(分别为60g和30gH2O kg-1)对罗德草和苏丹草生长和耗水的影响。施硅酸盐对植物生物量的影响与对照相似。而地上部和根部干重随土壤水分状况和植物种类的不同而有显著差异(P<；0.001)。在第一次采伐中，湿润土壤水分条件下的地上部干重为5.7g/盆，显著高于干旱土壤水分条件下的0.68%。对于苏丹草，地上部干重从对照的3.6g/盆变化到硅酸钙6 mg ha(-1)处理的4.3g/盆。植物需水量随着施硅酸钙施用量的增加而降低，说明施硅酸钙可以缓解干旱胁迫，提高水分经济性。对于研究中的土壤，植物需水量的减少代表着从0.076到近0.2的节水。
The effects of five rates [0 (control), 1, 2, 4 and 6 Mg ha(-1)] of calcium silicate on the growth and water consumption by rhodes grass (Chloris gayana Kunth) and sudan grass (Sorghum sudanense Piper) under wet and dry soil water regimes (60 g and 30 g H2O kg(-1) soil respectively) were evaluated in a pot experiment. The effect of the application of silicate on plant biomass was similar to that of the control. However, the shoot and root dry mass varied significantly (P < 0.001) according to the soil water regime and plant species. During the first cut, the shoot dry mass was 5.7 g per pot under the wet soil moisture regime, significantly exceeding that under the dry soil water regime proportionately by 0.68. For sudan grass, the shoot dry mass varied from 3.6 g per pot in the control to 4.3 g per pot in the treatment that received 6 Mg ha(-1) of calcium silicate. Plant water demand decreased as the rate of calcium silicate application increased, suggesting that an application of calcium silicate could reduce drought stress and enhance water economy. For the soil under study, the reduction in plant water demand represents a water saving ranging from 0.076 to nearly 0.20.