摘要
为探索我国干旱、半干旱地区咸水资源的利用途径,以宁夏海原县咸水灌区为例,并借助于国内外的成功经验,以生态经济观点,从土质、土壤及水文地质条件、气候特征、作物品种和土地经营管理技术等方面,综合分析咸水农业利用的可能性。并简要提及灌溉后的环境预测。
Saline water is a valuable resource in arid regions.We should eaplore its
using ways in agriculture practice shows, whether irrigation succeed or fail
with saline water is closely related to wate, quality, soil,climate, irrigating
skill and crop conditions.while water mineralization degree is 1--2 g/1, It
can be applied intermittently, but if more than 3 g/1,It can only be ap-
plied once in a while. If it has not close co-operation with other conditions,
irrigating with saline water will inevitably cause the deterioration of ecoen
vironment and decrease in land productivity.
Saline water should be used mainly on ventilative sandy soil. At. the
same time,We should pay more attention to the irrigating skills,and several
irrigating periods can not be intervaled. long Saline water. and fresh water
are mixed up to irrigate;take turns irrigating with them in different regions
and crisscrossing irrigation with them in the same field.These methods are
favourable.Let. not soil salt exceed limit for crops.
In arid region, in order to fit saline soil enveronment prefectly for
crop,We should choose some saltcrops patient or forage grass,Such as barley,
sorghum, rice, green chinese onion, beet,lycium, alfalfa etc .That will raise
land productivity and develop commdity economy.
出处
《干旱区资源与环境》
CSCD
1989年第1期31-39,共9页
Journal of Arid Land Resources and Environment
