Method for improving water resistance of vetiver grass in reservoir drawdown area

Abstract

The invention discloses a method for improving water resistance of vetiver grass in a reservoir drawdown area. The method includes the steps of firstly, raising seedlings; secondly, transplanting; and thirdly, maintaining. In seedling raising phase, watering frequency is increased, and watering amount is also increased, namely adaptability of vetiver grass to water is improved in the early stage, the adaptability of the vetiver grass to water can be improved during adapting, and foundation for water-resistant surroundings of the reservoir drawdown area in the late stage is laid. 15-25cm of each stem is reserved during transplanting, 5-10cm of root is reserved, transpiration is relieved, and survival of the vetiver grass benefits. No fertilizer is needed at the beginning of planting, roots of the vetiver grass are prone to injury during planting, fertilizer increases surrounding osmotic pressure of the roots, reverse osmosis easily occurs and is adverse to emergence of new roots, and survival rate is decreased. Applying farm manure after the emergence of the new roots guarantees early-phase sufficient nutrition and enables the vetiver grass to grow fast, foundation for improving water resistance in late flooding phase is laid, mass watering of the vetiver grass needs to be considered during growth, preparation is made for late flooding phase of the drawdown area, and water adaptability is trained in advance.

Description

technical field [0001] The invention belongs to the technical field of methods for improving the water resistance of plants, in particular to a method for improving the water resistance of vetiver grass when a reservoir is drained. Background technique [0002] Reservoir drawdown refers to the land area between the design water level of the reservoir (or land acquisition line) and the dead water level of the reservoir. At present, reservoirs that are mainly used for flood control, and reservoirs with multi-year regulation or annual regulation have a large amount of exposed space and a long time, with obvious certainty and strong regularity, and are precious land that can be selected for use. resource. Some of the existing reservoir areas are empty and not fully utilized, which is easy to cause silt blockage in the river, which is not conducive to protecting the ecological environment of the reservoir area; In China, drowning or drought is common, which is neither economica...

AI Technical Summary

Problems solved by technology

However, vetiver is generally only planted in the south of the Yangtze River, and vetiver is rarely cultivated and planted in the north of the Yangtze River. It needs to be introduced and planted. However, vetiver has poor water tolerance and is not suitable for growing in areas that have been flooded for several months.