盐碱地膜草覆盖、覆膜、裸地油葵对比试验研究

试验研究了行走式节水补灌燃煤烟气脱硫废弃物改良盐碱地条件下膜草覆盖、覆膜和裸地油葵的生长规律和地温。结果表明:①膜草覆盖的油葵全生育期为103 d,覆膜的为111 d,裸地的为119 d;②膜草覆盖油葵出苗率为57.0%,覆膜的为50.9%,裸地的为30.1%;③膜草覆盖的油葵株高为112.2 cm,覆膜的为102.0 cm、裸地的为73.0 cm;④膜草覆盖的油葵叶片数为27.0、覆膜的为26.0、裸地的为22.9;⑤在油葵生育前期膜草覆盖地表下0 cm、5 cm、10 cm、15 cm土壤平均温差分别比覆膜、裸地的低1.0℃、1.4℃,0.7℃、2.2℃,0.5℃、1.3℃,0.3℃、0.6℃,在生育后期膜草覆盖增温幅度明显降低;⑥膜草覆盖的产量较覆膜和裸地分别高44.9%和564.3%。

Studies on the Growth Rhythm and Ground Temperature of Oil-sunflower in Mulching film and Straw Screen、Mulching film fields and Bare Land in Saline-alkali Soil

With desulphrisation product as chemical improvement agent, the water-saving supplementary irrigation machinery as irrigation,We conducted an experiment in oil-sunflower growth covered film-straw screen、film and bare land.The growth rhythm and ground temperature of oil-sunflower in regular time were studied.The results showed as followes.① The growth periods of oil-sunflower to with mulching film and straw screen,mulching film and in bare land were respectively 103days,111days,119days.② The germination rate were respectively 57.0%,50.9%,30.1%.③The height of oil-sunflower were respectively 112.2 cm,102.0 cm,73.0 cm.④The number of leaves were respectively 27.0,26.0,22.9.⑤At the earlier stage of oil-sunflower,the average range of soil temperature below the earth's surface 0,5,10,15 cm of mulching film and straw screen were respectively lower 1.0 ℃、1.4 ℃,0.7 ℃、2.2 ℃,0.5 ℃、1.3 ℃,0.3 ℃,0.6 ℃ than that of the mulching film and the bare land.⑥The yields of oil-sunflower with mulching film and straw screen increased by 44.9% and 564.3% than that with the mulching film and in the bare land