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water-retaining agent
释义
water-retaining agent
Encyclopedia
农学
保水剂
释
water-retaining agent
保水剂
一种不溶于水,具有膨胀性且吸水力强的物质。能吸收自身重量几百倍的纯水,并可缓慢释放供作物利用,且能反复吸水。施用于土壤可减少水分养分流失,调节水、肥、气、热状况,改善肥力结构,是较好的土壤改良剂。
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marine geological survey
marine geology
marine geology and geophysics observation apparatus
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marine geomagnetic map
marine geophysical map series
marine geophysical survey
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marine geopolitics
marine gravimeter
marine gravimetric survey instrument
marine gravimetry
marine gravimetry corrections
marine gravity field
marine gravity gradiometer
marine gravity gradiometry
marine gravity recover
marine gravity reduction to basepoint
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marine gravity survey equipment
marine gravity survey information processing system
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