不同结构农田防护林蒸腾耗水与节水潜力的研究

通过对黑龙江省西部地区不同结构农田防护林蒸腾耗水与节水潜力的试验研究,结果表明,黑龙江省西部地区不同结构农田防护林蒸腾耗水量的月变化有明显的差异性,其中落叶松纯林在8月的蒸腾耗水量最大,理论值为1319.67mm,实际值为723.75mm,而樟子松纯林6月的蒸腾耗水量最小,理论值为29.4mm,实际值为15.64mm;对生长季不同结构农田防护林的蒸腾耗水量进行了排序,其实际蒸腾耗水量排序为:落叶松纯林樟子松和小黑杨混交林落叶松和小黑杨混交林银中杨成林小黑杨纯林樟子松纯林银中杨幼林;给出了不同结构农田防护林的节水潜力,其差异很大,其中落叶松纯林节水潜力最大,理论上节水2586.9kg·hm-2,实际上可节水1284.69kg·hm-2,且樟子松与小黑杨混交林的实际节水量与之相当。

Transpiration Water Consumption &Water-Saving Potential of Farmland Shelterbelt with Different Structures

Through experimental study on transpiration water consumption ＆ water-saving potential of farmland shelterbelt with different structures in western region of Heilongjiang province,result shows that： monthly variation of transpiration water consumption of farmland shelterbelt with different structures in this region have significant differences, among them transpiration water consumption of pure forest of larch in August is maximum,and theoretical value is 1 319.67 mm ,and actual value is 723.75 mm,while transpiration water consumption of pure forest of Pinus sylvestris vat. mongolica in June is minimum,only being 29.4 mm, actual value being 15.64 mm ;transpiration water consumption of farmland shelterbelt with different structures in growing season were sequenced,its actual transpiration water consumption sequencing is： pure forest of larch 〉 mixed forest of Pinus sylvestris var. mongolica ＆ Popuhts simonii × P. nigra 〉 mixed forest of larch ＆ Populus simonii × P. nigra 〉 adult Populus alba × Populus berolinensis 〉 pure forest of Populus simonii × P. nigra 〉 pure forest of Pinus sylvestris var. mongolica 〉 young forest of Populus alba × Populus berolinensis ;water-saving of farmland shelterbelt with different structures which have significant differences are given, among them water-saving potential of pure forest of larch is the most; it can save water 2 586. 9kg . hm-2 in theory and save water 1 284.69 kg . hm-2 actually;the actual water-saving amount of mixed forest of Pinus sylvestris vat. mongolica ＆ Populus simonii × P. nigra is equal to that of pure forest of larch.