Soil available nutrients and rice yield with silicon and phosphorus fertilization
-
摘要: 为探讨硅肥添加对磷肥利用率的提高效应,采用盆栽试验的方法,分别设立硅肥和磷肥3个不同水平[二氧化硅施用量分别为0(低),0.25(中),0.50(高) gkg-1,五氧化二磷施用量分别为0(低),0.2(中),0.4(高) gkg-1],共9个处理,研究不同硅磷配施比例对水稻Oryza sativa土中速效养分和水稻产量的影响。结果表明:硅磷配施提高了土壤pH值、碱解氮、有效磷和速效钾的质量分数。在低磷和中磷条件下,有效硅质量分数随着硅磷配施水平的提高而提高;但高磷条件下,趋势不明显。硅磷配施也提高了水稻收获期的植株干物质积累总量和糙米产量。在低硅和中硅(或低磷和中磷)水平下,随着磷肥(或硅肥)的施用,干物质质量随之增加,但在高硅(或高磷)水平下有减少趋势。在低硅和中硅水平下,水稻产量随着磷肥水平的提高而增加,在中硅高磷配施处理下达到最高。因此,本试验土壤有效磷为37 mgkg-1,有效硅为157 mgkg-1条件下,硅磷配施能够显著提高水稻土中有效磷及其他有效养分的质量分数、水稻干物质总质量和糙米产量。表4参13Abstract: It had been confirmed that silicon(Si) could enhance P efficiency in paddy soil, but the interactional effect of different ratio of Si and P fertilization was rarely documented. Therefore, the study aims to understand the effects of fertilization with different ratios of Si and P on soil fertility and rice yield. Three levels of Si and P fertilizers treatments were carried out through a pot experiment(0, m and h mean light, moderate and high treatments respectively), nine different treatments included Si0P0, Si0Pm, Si0P0, SimP0, SimPm, SimPh, SihP0, SihPm, SihPh. Sodium silicate and calcium dihydrogen phosphate were used as Si and P fertilizers respectively. Each treatment had five replications and random arranged. After rice harvest, soil samples (about 1 kg fresh weight) were collected from each pot, air dried and sieved through a 2 mm stainless steel screen, then stored for pH, available nitrogen(N), phosphorus, potassium(K) and silicon analysis. Rice yield components were also determined. The data was analyzed in Microsoft 2003, SPSS 18.0(ANOVA). Means were tested using the least significant difference(LSD) with a significance of P<0.05. The soil pH value was significantly increased with the amount of P fertilization when compared with Si0P0 treatment under light and moderate Si level, but showed no difference under high Si level. Under the same P level, the soil pH value was significantly increased with the application amount of Si. Under moderate Si level, the content of available N was significantly increased with the application amount of P, whereas, the amount of Si fertilization showed no significant effect on available N under the same P level. The available P was significantly increased with the application amount of Si under the same P level. The highest available P content occurred with treatment SihPh. Under moderate Si level, the available K was significantly increased with the application amount of P, but showed no difference under light and high Si level. Available Si was significantly increased with light and moderate P application. Under light and moderate Si or P level, the rice dry matter weight increased significantly with the application amount of Si or P. Rice grain yield increased significantly with the P application amount under light and moderate Si application. The highest grain yield for the nine treatments occurred with SimPh which increased by 74.78% compared with Si0P0. In this pot experiment, application of moderate Si with P fertilization could enhance the soil pH, available N, P, K and Si, rice dry matter weight and grain yield in paddy soil. There had significant interaction between different amount of Si and P applying. [Ch, 4 tab. 13 ref.]
-
-
链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2015.04.009

计量
- 文章访问数: 2259
- HTML全文浏览量: 369
- PDF下载量: 481
- 被引次数: 0