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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Indicator species for the natural regeneration of Shorea robusta Gaertn. f. (sal).
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Indicator species for the natural regeneration of Shorea robusta Gaertn. f. (sal).

机译：浓香果树天然再生的指示剂种类。 F。 （sal）。

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摘要

The objectives of this study were to (1) determine the positive and negative associates/indicators for sal (Shorea robusta) regeneration in different strata at Doon valley, Uttar Pradesh, India, using chi-square and various association indices and (2) correlate soil parameters such as temperature, moisture and pH with sal regeneration. Results showed that sal was positively correlated to soil moisture at seedling stage. At sapling stage, this correlation was positive but not significant, and finally in the mature stage, it was negatively correlated to soil moisture. Soil temperature was however negatively related with sal at seedling and sapling stages and positively (non-significant) related at mature stage. Statistically significant correlation between different stages of sal, viz. tree, sapling, seedling and soil parameters, has clearly shown that the requirements of the species changes from one stratum to another, and so does the association with various species. Sal at maturity was negatively associated with Mallotus philippensis and Terminalia alata [T. elliptica]. Competition for soil moisture between sal and Syzygium cumini may be responsible for their negative association in all the three strata. Ehretia laevis was the only tree species having significant positive association with sal. Shrubs and herbs are thought to be better indicators for sal regeneration. In the shrub layer, most of the species (nearly 62%) were positively associated with sal saplings. A strong and significant positive association between the sal and Clerodendron viscosum was observed in both sapling and seedling stages. Significant negative association was found between sal saplings and Adhatoda vasica [Justicia adhatoda], Pogostemon plectranthoides, Murraya koenigii and Jasminum multiflorum. Sal seedlings were significantly associated with Oplismenus compositus and Sida cordifolia.
机译：这项研究的目的是（1）使用卡方和各种关联指数来确定印度北方邦Doon谷不同地层的Sal（Shorearobusta）再生的正向和负向关联/指标（2）相关土壤参数，例如温度，湿度和pH随盐碱再生。结果表明，sal与苗期土壤水分呈正相关。在幼树期，这种关系是正的但不显着，最后在成熟期，它与土壤水分呈负相关。然而，土壤温度在苗期和幼树期与sal呈负相关，而在成熟期与sal呈负相关（无显着性）。 Sal，即不同阶段之间的统计显着相关性。树木，树苗，幼苗和土壤的参数清楚地表明，物种的需求从一个层次变化到另一个层次，并且与各种物种的关联也发生了变化。婆罗双树在成熟时与菲律宾墨us和榄仁（Terminalia alata）呈负相关[T。椭圆]。 Sal和Syzygium cumini之间争夺土壤水分的原因可能是它们在所有三个层次中的负相关。 Ehretia laevis是唯一与sal有显着正相关的树种。灌木和草药被认为是再生盐的更好指标。在灌木层，大多数物种（近62％）与萨尔树苗呈正相关。在幼树期和幼苗期都观察到sal和粘枝无核菌之间有很强的显着正相关。在幼树幼树和Adhatoda vasica [Justicia adhatoda]，Pogostemon plectranthoides，Murraya koenigii和Jasminum multiflorum之间发现了显着的负相关。 Sal幼苗与Oplismenus compositus和Sida cordifolia显着相关。

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