Rain cultivation method of forestation on dry-hot valley dryland hillside fields

A technology for dry and hot valleys and sloping land, which is applied in the fields of land preparation, afforestation, forestry, etc. It can solve the problems of no forest land, poor vegetation coverage, and weak seedlings, etc., and achieve the effect of reducing afforestation costs, strong practicability, and easy operation

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

AI Technical Summary

Problems solved by technology

However, the existing afforestation technology has defects such as the excavation and planting pond is too small, the seedlings are planted in the same year, the seedlings are weak, and no base fertilizer is applied for soil improvement, etc., so that the survival rate of afforestation in this area has always been low, and the vegetation coverage rate has been at a low level for a long time. Poor level, resulting in the situation of no forest land for afforestation every year

Method used

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  • Rain cultivation method of forestation on dry-hot valley dryland hillside fields

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Effect test

Embodiment 1

[0019] Project: 1,000 mu rainfed tamarind afforestation project. Afforestation location: Dry and hot valley in Yuanmou County, Yunnan Province

[0020] 1. Excavation of the big pond: When the soil was moist at the end of the rainy season last year, the tamarind seedlings were excavated along the contour line of the afforestation slope and planted in the big pond. The length, width and depth of the big pond are 120cm×80cm×100cm. Separate the excavated topsoil and subsoil. Allow natural sunlight to fully expose the soil to backfill.

[0021] 2. Fertilizer backfill: One month before the rainy season in the year of planting, mix the fully exposed soil with 10kg of organic fertilizer and 4kg of calcium magnesium phosphate fertilizer per pond, and then backfill in layers, topsoil backfilling in the lower pond layer, and subsoil backfill in the upper pond layer. The backfill soil is 10cm lower than the planting pond to facilitate the accumulation of rainwater in the big pond. After...

Embodiment 2

[0028] Project: State Forestry Administration's 5,000-mu conversion of farmland to forestry project (Panzhihua and Leucaena), location: Yangkaiwo River Basin in the dry-hot valley of Yuanmou, Yunnan. Except that following measures are different from Example 1, all the other methods are the same as Example 1.

[0029] 1. Excavation of the big pond: the length, width and depth of the big pond of the two tree species are the same as those in Example 1.

[0030] 2. Fertilizer backfill: The backfill fertilizer for Leucaena juniperus is 5kg of organic fertilizer and 2kg of calcium magnesium phosphate fertilizer; for Panzhihua colonization, it is 8kg of organic fertilizer and 2.5kg of calcium magnesium phosphate fertilizer.

[0031] 3. Cultivate strong seedlings for colonization: The cultivation of Leucaena and Panzhihua seedlings began in the previous year of afforestation. After about one year of management, the bare-root seedlings with developed root systems and thick stems withou...

Embodiment 3

[0033] Embodiment 3 (contrast: existing afforestation technology)

[0034] During the implementation process of returning farmland to forests with the participation of farmers in dry and hot valleys in Yuanmou County, they dug planting holes with a length, width, and depth of 40cm×40cm×40cm when the rainy season came that year, and did not make water storage circles (i.e. fish scale pits). , No base fertilizer is applied, just dig and plant, and the tamarind, leucaena and panzhihua seedlings cultivated in the past can be planted in the pond. After the survey at the end of the rainy season, the survival rate of the seedlings was only about 65%. After the drought, the survival rate in the second year was only 60%, and the growth of the seedlings was weak, and the seedlings were dying every year. After that, the seedlings were replenished every year. Greatly increase the cost of afforestation.

[0035] Table: the inventive method and the effect contrast of existing afforestation...

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Abstract

The invention discloses a method for water-fed forestation in arid hillside fields of arid-hot river valleys, pertaining to the technical field of water-saving agriculture. The method comprises the steps of digging large ponds, backfilling prepared fertilizers, cultivating, strengthening and field planting seedlings, timely field planting against the rain in rain season, covering with grass to keep water, top dressing in rain season to promote the seedlings, wherein, the length, the width and the depth of the planting hole of an arbor tree is 120 cm multiplied by 80 cm multiplied by 100 cm while a frutescose tree is 80 cm multiplied by 50 cm multiplied by 60 cm and the planting hole is perpendicular to slope direction; when backfilling the soil, the soil in each pond is mixed with 5 kg to 10 kg of organic fertilizer and 2 kg to 4 kg of mixed fertilizer of calcium, magnesium and phosphate fertilizers; field planting is carried out in May to June with sufficient rain water; after the field planting of nursery stocks, the weeds are cut in time for covering the tree pond; approximately 20 days after the field planting of the nursery stocks, quick effective nitrogen fertilizer is applied in proper time. Adoption of the method of the invention can enhance the survival ratio of forestation in arid hillside fields of arid-hot valleys under the circumstances of no irrigation water to more than 95 percent and the preservation rate to more than 90 percent. The technology of the invention is scientific, reasonable and feasible and has high significance in revegetation and ecological reconstruction of arid-hot river valleys.

Description

technical field [0001] The invention relates to the technical field of water-saving agriculture, in particular to a method for rain-fed afforestation in dry-hot valleys and slopes. Background technique [0002] The ecological environment of dry and hot valleys is extremely fragile, with serious soil erosion and severe degradation of the ecological environment. The forest coverage rate is extremely low, only 3.4% to 6.3%, the vegetation coverage rate is less than 50%, and flat land or slope land less than 5° only accounts for 17%. , gully density 21.5KM / KM 2 , most of which are moderately or above degraded barren slopes. The climate in this area is dry and hot, the soil withering humidity (PWP) lasts for 7 to 8 months, the dryness is 4.4 (calculated by Penman formula), the annual average rainfall is between 558-801.2mm, and the evaporation is 2636-3830mm. The rainfall is 3.4-6.0 times, the water and heat balance is seriously out of balance, and the drought is very serious. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G23/04A01G13/02A01B79/00C05G1/00
CPCY02A40/22Y02P60/40
Inventor 潘志贤纪中华方海东杨艳鲜廖承飞沙毓沧杜波和寿甲袁理春李建增马开华张德冯光恒
Owner RES INST OF TROPICAL ECO AGRI SCI YUNAN ACAD OF AGRI SCI
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