Freshwater shortage is the main problem in Heilonggang lower-lying plain, while a considerable amount of underground saline water is available. We wanted to find an effective way to use the brackish water in winter wh...Freshwater shortage is the main problem in Heilonggang lower-lying plain, while a considerable amount of underground saline water is available. We wanted to find an effective way to use the brackish water in winter wheat production. Surface mulch has significant effect in reducing evaporation and decreasing soil salinity level. This research was aimed at comparing the effect of different mulch materials on winter wheat production. The experiment was conducted during 2002-2003 and 2003-2004. Four treatments were setup： （1） no mulch, （2） mulch with plastic film, （3） mulch with corn straw, （4） mulch with concrete slab between the rows. The result indicated that concrete mulch and straw mulch was effective in conserving soil water compared to plastic film mulch which increased soil temperature. Concrete mulch decreases surface soil salinity better in comparison to other mulches used. Straw mulch conserved more soil water but decreased wheat grain yield probably due to low temperature. Concrete mulch had similar effect with plastic film mulch on promoting winter wheat development and growth.展开更多
为实现旱区春小麦种植生产环境效益和经济效益双赢,依托大田试验,研究不同覆盖措施秸秆带状覆盖、地膜覆盖、秸秆碎秆覆盖和对照露地平作对旱区春小麦产量及碳效率的影响,并对经济效益进行了评价。结果表明,与露地平作相比,地膜覆盖显...为实现旱区春小麦种植生产环境效益和经济效益双赢,依托大田试验,研究不同覆盖措施秸秆带状覆盖、地膜覆盖、秸秆碎秆覆盖和对照露地平作对旱区春小麦产量及碳效率的影响,并对经济效益进行了评价。结果表明,与露地平作相比,地膜覆盖显著提高了生育期春小麦干物质积累量,增幅为37.58%;秸秆带状覆盖提高了小麦开花期和收获期干物质积累量,增幅分别为32.65%和9.83%。秸秆碎秆覆盖、地膜覆盖千粒重较露地平作分别提高了15.55%、21.91%。地膜覆盖碳投入总量增幅最大,较露地平作增加1223.07 kg C/hm^(2)。秸秆碎秆覆盖较露地平作籽粒碳和植株碳产出量分别提高了38.41%和23.34%。秸秆带状覆盖提高了碳生产效率、碳经济效率、碳生态效率,增幅分别为0.58%、0.45%、0.24%。秸秆碎秆覆盖经济效益为3882.69元,较露地平作增加22.7%。综合表明,各覆盖措施均能提高春小麦产量和经济效益,其中秸秆带状覆盖显著提高了碳生产效率、碳经济效率和碳生态效率。展开更多
基金Project supported by the Hi-Tech Research and Development Program (863) of China (No. 2002AA2Z404), and the Key Innovation Project (No. KZCX3-SW-446) from Chinese Academy of Sciences,China
文摘Freshwater shortage is the main problem in Heilonggang lower-lying plain, while a considerable amount of underground saline water is available. We wanted to find an effective way to use the brackish water in winter wheat production. Surface mulch has significant effect in reducing evaporation and decreasing soil salinity level. This research was aimed at comparing the effect of different mulch materials on winter wheat production. The experiment was conducted during 2002-2003 and 2003-2004. Four treatments were setup： （1） no mulch, （2） mulch with plastic film, （3） mulch with corn straw, （4） mulch with concrete slab between the rows. The result indicated that concrete mulch and straw mulch was effective in conserving soil water compared to plastic film mulch which increased soil temperature. Concrete mulch decreases surface soil salinity better in comparison to other mulches used. Straw mulch conserved more soil water but decreased wheat grain yield probably due to low temperature. Concrete mulch had similar effect with plastic film mulch on promoting winter wheat development and growth.
文摘为实现旱区春小麦种植生产环境效益和经济效益双赢,依托大田试验,研究不同覆盖措施秸秆带状覆盖、地膜覆盖、秸秆碎秆覆盖和对照露地平作对旱区春小麦产量及碳效率的影响,并对经济效益进行了评价。结果表明,与露地平作相比,地膜覆盖显著提高了生育期春小麦干物质积累量,增幅为37.58%;秸秆带状覆盖提高了小麦开花期和收获期干物质积累量,增幅分别为32.65%和9.83%。秸秆碎秆覆盖、地膜覆盖千粒重较露地平作分别提高了15.55%、21.91%。地膜覆盖碳投入总量增幅最大,较露地平作增加1223.07 kg C/hm^(2)。秸秆碎秆覆盖较露地平作籽粒碳和植株碳产出量分别提高了38.41%和23.34%。秸秆带状覆盖提高了碳生产效率、碳经济效率、碳生态效率,增幅分别为0.58%、0.45%、0.24%。秸秆碎秆覆盖经济效益为3882.69元,较露地平作增加22.7%。综合表明,各覆盖措施均能提高春小麦产量和经济效益,其中秸秆带状覆盖显著提高了碳生产效率、碳经济效率和碳生态效率。
