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为探讨味精废浆改良林地土壤的生物学效应以及确定化肥与味精废浆配施的合适比例,以欧美I-107杨为试材,通过连续4 a的大田试验,研究了CK(对照,不施肥)、N100(尿素提供100%的氮)、M_(10)N_(90)(味精废浆和尿素分别提供10%与90%的氮)、M_(30)N_(70)(味精废浆和尿素分别提供30%与70%的氮)与M50N50(味精废浆和尿素各提供50%的氮)等处理对杨树林地土壤总有机碳、活性有机碳组分与其有效率、碳库管理指数(carbon pool management index,CPMI)及林木生长的影响。结果表明:同N100处理相比,M_(10)N_(90)、M_(30)N_(70)和M_(50)N_(50)处理的总有机碳含量均显著升高,其中M50N50处理明显高于其他处理;M_(30)N_(70)处理的活性有机碳(active organic carbon,AOC)、可溶性有机碳(dissolved organic carbon,DOC)、微生物量碳(microbial biomass carbon,MBC)含量及其有效率均达最高值,其中AOC质量分数分别较CK、N100、M_(10)N_(90)和M50N50处理显著高出43.58%、59.35%、20.71%和9.65%,DOC质量分数分别显著高出62.71%、52.38%、28.00%和14.29%;同时,M_(30)N_(70)处理的CPMI达到192.56,分别比N100、M_(10)N_(90)和M_(50)N_(50)处理明显提高89.45、43.58和30.86。此外,M_(30)N_(70)处理的胸径、树高和材积平均生长率分别为23.40%、21.62%和45.05%,亦明显高于其他处理。与M_(30)N_(70)处理相比,M_(10)N_(90)和M50N50处理对林地土壤活性有机碳各组分、CPMI和林木生长率的作用效果较小。相关性分析表明,材积生长率与AOC、AOC有效率、DOC、MBC和CPMI存在极显著相关关系(P<0.01)。可见,味精废浆与化肥以3∶7比例配施能提高杨树林地土壤活性有机碳含量和碳库管理指数,有利于改善土壤质量、提高土壤肥力,并促进林木生长,从而为味精废浆在林业上的高效利用提供理论依据。
In order to explore the biological effects of improved MSW waste woodland soils and determine the appropriate proportion of chemical fertilizer and MSW waste slurry, the effects of MS (I-107) Fertilization), N100 (urea provides 100% nitrogen), M 10 N 90 (MSG waste and urea provide 10% and 90% nitrogen respectively), M 30 N 70, And urea respectively provide 30% and 70% nitrogen) and M50N50 (MSG waste and urea each provide 50% nitrogen) and other treatments on soil total organic carbon, active organic carbon components and their efficiency, carbon stock management Carbon pool management index (CPMI) and tree growth. The results showed that compared with N100 treatment, the total organic carbon content of M_ (10) N_ (90), M_ (30) N_ (70) and M_ (50) N_ (50) The content of active organic carbon (MOC), dissolved organic carbon (DOC) and microbial biomass carbon (MBC) of M_ (30) N_ (70) The highest efficiency was reached, and the AOC content was significantly higher than that of CK, N100, M_ (10) N_ (90) and M50N50 by 43.58%, 59.35%, 20.71% and 9.65% 62.71%, 52.38%, 28.00% and 14.29% respectively. Meanwhile, the CPMI of M_ (30) N_ (70) reached 192.56, which was respectively higher than N100, M_ (10) N_ (90) and M_ (50) N_ Significantly increased 89.45, 43.58 and 30.86. In addition, the average DBH, tree height and volume average growth rates of M 30 N 70 were 23.40%, 21.62% and 45.05%, respectively, which were significantly higher than other treatments. Compared with M_ (30) N_ (70) treatment, M_ (10) N_ (90) and M_50N50 treatments had little effect on soil active organic carbon components, CPMI and forest growth rate. Correlation analysis showed that there was a significant correlation between volume growth rate and AOC, AOC efficiency, DOC, MBC and CPMI (P <0.01). Visible, monosodium glutamate waste and fertilizers with 3: 7 ratio to improve the activity of poplar woodland soil active carbon and carbon management index is conducive to improving soil quality and improve soil fertility, and promote forest growth, so as MSG waste Provide a theoretical basis for efficient use of forestry.