【作者】 揣新军；

【导师】 孙旭；

【作者基本信息】 内蒙古农业大学 ， 水土保持与荒漠化防治， 2009， 硕士

【摘要】 本文以河套灌区的农田防护林为研究对象,通过对所选农田防护林背风面距林带不同距离处小麦株高、穗长、每穗小穗数、穗粒数、第一节间长、穗下节间长、千粒重和产量的测定以及林网内小麦与对照小麦生育期的平行对比观测,研究了农田防护林的增产效益。结果如下:河套灌区的农田防护林能够增加小麦的产量,所选三条样线小麦的平均产量均显著高于对照麦田,平均增产率分别为7.2%、8.6%和7.4%。农田防护林的积极作用改善了小麦的籽粒质量和各项生理指标,林网内的小麦整个生育期延长,出苗、三叶、拔节、抽穗和开花时间都不同程度的提前,而成熟比对照小麦晚了4天。河套灌区的农田防护林可以增加小麦平均株高、穗长、每穗小穗数、穗粒数、穗下节间长和千粒重,进而提高小麦产量。通过研究表明,在距离林带较近的1H处减产,在3H处增产效益最大,4H～5H处增产次之,2H和6H处增产效果不明显,属平产区域。更多还原

【Abstract】 Based on farmland shelter forest in Hetao irrigation area, by way of determining the plant height, spike length, spikelet number per spike, filled grain number per spike, the first internode length, internode length below spike, 1000-grain weight and yield of wheat in the different distance of farmland shelter forest leeward side and observing growth period of wheat in forest network and contrast wheat in the mean time, this paper studied the yield increase benefit of farmland shelter forest. The results are as follows:The farmland shelter forest in Hetao irrigation area can increase the wheat yield, average yield of wheat on three line selected was higher than compared wheat field significantly.the average yield increasing rate is 7.2%,8.6% and 7.4% respectively.The farmland shelter forest’s positive role has improved grain quality and various physiological index of wheat. The whole growth period of wheat in forest network prolonged, period of emergence, three leaves stage, jointing, heading and flowering are ahead of time in different extent. While mature period late four days compared with contrast wheat.The farmland shelter forest in Hetao irrigation area can increase average plant height, spike length, spikelet number per spike, filled grain number per spike, internode length below spike and 1000-grain weight of wheat, then improve the wheat yield. Research shows that wheat yield reduce at 1H which is near the shelterbelt, yield increasing to the maximum at 3H, yield increasing at 4H and 5H takes the second place, yield increasing effect at 2H and 6H does not obvious, belongs to normal yield zone.更多还原