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Method of forestation on Jinshajiang river dry-hot valley partitioned slope horizontal ditch

A dry-hot valley and horizontal ditch technology, applied in afforestation, land preparation methods, forestry and other directions, can solve the problems of seedlings not taking root, not opening ditches to collect water, not retaining water and fertilizer, etc., to increase rainwater infiltration, operability, etc. Strong, scientific and practical effect

Inactive Publication Date: 2008-10-29
RES INST OF TROPICAL ECO AGRI SCI YUNAN ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention overcomes the defects of only digging planting pits without ditches for water collection in traditional afforestation methods, seedlings do not take root, and do not retain water and fertilizer. The present invention can produce the following beneficial effects:

Method used

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  • Method of forestation on Jinshajiang river dry-hot valley partitioned slope horizontal ditch

Examples

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Effect test

Embodiment 1

[0021] Present embodiment 1 is illustrated with Jatropha curcas, Leucaena afforestation as example, and afforestation area is about 110 mus and 200 mus respectively, and annual bag seedlings are all adopted during afforestation, and the afforestation method of two kinds of seedlings all carries out by the following steps:

[0022] 1. Construction of horizontal ditches across slopes: In February, select barren slopes suitable for forestry to build horizontal ditches along the contour lines. The width of the horizontal ditch excavation is 60cm, the depth is 80cm, and the distance between the ditch is 2m. When excavating, the topsoil is placed on the upper edge of the ditch, and the raw soil is placed on the lower edge of the ditch, which is convenient for stacking and backfilling.

[0023] 2. Soil backfill: topsoil is backfilled at the bottom of the ditch, and the raw soil is placed on top to facilitate maturation. After the backfill is settled, it occupies 3 / 4 of the ditch dept...

Embodiment 2

[0028] Embodiment 2 and embodiment 3: embodiment 2 and embodiment 3 build wide, deep, long difference and different in fertilization amount at the horizontal ditch of separating slope listed in table 1, all the other operation steps and methods are all with embodiment 1, see Table 1 for details.

Embodiment 4

[0029] Embodiment 4 (contrast is traditional afforestation method)

[0030] Embodiment 4 adopts traditional afforestation method to carry out, and implementation area is about 50 mus, and nursery stock is bag seedling equally, specifically carries out according to the following steps:

[0031] 1. Digging planting pits: After the rain in May or July, when the soil is moist, dig planting pits with a length, width, and depth of about 25 cm in the afforestation area according to the afforestation density.

[0032] 2. Seedling planting: Tear off the plastic bag of seedlings, put the seedlings, return the soil and fill until the soil above the root zone is slightly ridged, then compact the ridged soil, and then sprinkle a layer of loose soil to make it level with the surrounding soil, and finally use soil A circle along the outer edge of the pit is made into a rain pit. Soil compaction is good for the roots of seedlings to receive moisture from the soil, and spreading a layer of lo...

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Abstract

The invention discloses a method for forestation by means of level trenches on separated slopes in arid-hot valleys of the Jinshajiang River, pertaining to the technical field of soil and water conservation. The method comprises the essential steps of building level trenches on separated slopes, refilling soil, setting nursery stocks and covering with grass. The method of the invention adopts measures such as utilizing the reasonable level trenches on separated slopes to accumulate nature rainfall, mixing appropriate base fertilizers in the refilling soil, etc., which greatly increases the survival ratio and preservation rate of forestation nursery stocks. The method of the invention can ensure that the survival ratio of nursery stocks of jatropha curcas and hedge acacia under the circumstances of no irrigation water is increased to more than 95 percent, which is increased by 32 percent and 18 percent respectively than the control group, and both preservation rates are increased to more than 92 percent in 1 year and are respectively 42 percent to 82 percent higher than the control group; after half a year, the tree crown growing widths of the jatropha curcas and the hedge acacia are increased by 50 cm multiplying 49 cm <2> and 32 cm multiplying 32 cm <2> respectively. The method of the invention successfully solves the problem of soil moisture during forestation in arid-hot areas of the Jinshajiang River and has practical and profound significance in revegetation and ecological reconstruction of such areas.

Description

technical field [0001] The invention relates to the technical field of water and soil conservation, in particular to a new method for afforestation in a dry-hot valley of the Jinsha River with horizontal ditches across slopes. Background technique [0002] Dry-hot valleys are mainly located in the valleys of the four major rivers of the Yuanjiang River, the Jinsha River, the Nujiang River, and the Lancang River in southwest China, at latitude 23°00′~28°10′ north and longitude 98°50′~103°50′ east. The southeast is bounded by Mengzi and Manhua, the west is bounded by the Nujiang River Valley and the mountains, and the north is bounded by Yongshan in the Jinsha River Basin. Along with the dry and hot or dry and warm boundaries of the major rivers and rivers, it forms a polygonal row or irregular cobweb shape. Its actual range is arid and semi-arid along the river banks below 1500M above sea level, and the south subtropical valley area with aridity greater than 1.5. The vegetati...

Claims

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Application Information

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IPC IPC(8): A01G23/00A01G23/04A01G13/02A01B79/00C05G1/00
CPCY02A40/22Y02P60/40
Inventor 杨艳鲜纪中华方海东潘志贤廖承飞冯光恒沙毓沧袁理春李建增杨顺林和寿甲杜波韩学琴邓红山
Owner RES INST OF TROPICAL ECO AGRI SCI YUNAN ACAD OF AGRI SCI
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