有机培肥化肥减量对夏玉米含碳率及固碳量影响

为探讨不同施肥措施对玉米固碳能力的影响,以传统施肥为对照,设置化肥减量增施有机肥和秸秆6个处理,在玉米抽穗期、吐丝期和成熟期取样,分析不同器官含碳率和固碳量的差异。结果表明,不同生育期玉米植株器官含碳率有差异,地上器官(叶、茎、籽粒等)含碳率显著高于地下器官(根)。化肥减量30%增施有机肥和化肥减量30%增施秸秆2个处理相对化肥减量50%和化肥减量70%处理能有效提高玉米全株含碳率。化肥减量增施有机肥不仅提高植株收获物籽粒的含碳率,还增加还田产物茎和叶器官的含碳率。对不同处理玉米区域固碳量分析表明,玉米地上部分固碳量显著高于地下部分,化肥减量增施有机肥各处理平均区域固碳量高于化肥减量增施秸秆处理。     

烟叶烘烤能耗与节能途径分析

结合烟叶烘烤过程中水分的散失机理，对热风循环烘烤模式的优缺点进行了分析和探讨.指出对现有热风循环烘烤模式进行变革和创新是实现烘烤节能的根本途径。     

螯合态活性复混肥中钾细菌存活性初探

研究了将化肥、微生物肥料、螯合态微量元素、有机质、矿物质混合造粒的多元复混肥中特定活体微生物——钾细菌的存活性。该制剂在化肥等无机物含量为 70 %的高渗条件下 ,加入钾细菌的活菌回收率达40 %～ 75 % ;室温条件下保存半年至一年其中钾细菌含量无明显下降。该制剂是一种营养全面、易保存、使用方便、将化肥等无机物与活体微生物融为一体的新型复合肥料     

汉中市专业化烘烤的发展与思考

从汉中市烤烟专业化烘烤的内涵和发展入手,详述了专业化烘烤合作社的组织运行模式.根据2008年的试验情况,研究认为,专业化烘烤合作社与传统烘烤相比有明显的优势,但仍存在一些不足.为尽快完善专业化烘烤合作社的运行,指出了当前存在的问题,并提出了应对措施.     

普通硅肥与纳米硅肥对烤烟内生真菌种群结构的影响

To explore the effects of common silicon fertilizer and nano-silicon fertilizer on the population structure of endophytic fungi in flue-cured tobacco,Yunyan 99 was used as test material, common silicon and nano-silicon were sprayed at vigorous growth,budding and dome stages.The treatments were set as follows: CK (water), T5 (common silicon,0.17 kg/hm²), T8 (nano-silicon,0.32 kg/hm²).The effects of different silicon fertilizer on the diversity, composition, structure, chemical composition and aroma substance of endophytic fungi in flue-cured tobacco were studied. Compared with CK, T5 and T8 treatment could effectively improve the community diversity,composition, structure and the content of chemicals and aroma substances. Compared with CK, the diversity of endophytic fungi increased under T8 treatment and decreased under T5 treatment.Compared with CK, the relative abundance of Basidiomycota under T5 and T8 increased by 58.14% and 37.35%, respectively,at the same time, the relative abundance of Flobasidium increased by 113.17% and 417.07%, respectively.Among them, T8 treatment increased the species of endophytic fungi, among which,31 species were more than CK treatment. The correlation analysis was based on chemical composition, aroma substances of tobacco leaves and endophytic fungal community composition.The contents of nicotine,soluble protein,Maillard reaction products and aroma substances were significantly related to the community composition of endophytic fungi in tobacco leaves. The diversity of endophytic fungi in tobacco leaves could be increased by spraying nano-silica fertilizer on leaf surface,and the content of chemicals and aroma substances of tobacco could be changed.It is meaningful for human to produce high quality flue-cured tobacco.     

氮素形态及配比对烤烟生长和品质的影响

通过不同氮素形态及配比对烤烟生长发育和产质影响的研究,发现在基肥中随着硝态氮比例的增加,可促进烟株早期生长;增强烟株对花叶病和赤星病的抗性;提高烟叶产质、上等烟比例及内在品质,但当硝态氮的比例达到50％时这种正效应均达最大,以后变化不大。由此可以认为基肥中硝态氮比例达到50％是生产上烟叶优质适产的理想值。     

几个有关土壤水问题的探讨

本文从孔径分布连续性的角度，讨论弛毛管水联系破裂湿度和土壤水运动阶段的划分在定量上的不确定性。同时，根据土壤－植物－大气连续体系水分热力学函数的实测资料，论证了在判断土壤水运移方向时，熵增加原理的局限性和偏摩尔Ｇｉｂｂｓ自由能减小原理的适用性。并且进一步阐明了水流第二定律的三个基本点，以及在应用该定律时曾经出现的误解。     

烤烟直播漂浮育苗综合配套技术研究

烤烟直播漂浮育苗省工省时,可有效减少病虫害的发生,本文从三个方面对该项技术的技术要点及关键点进行了阐述,并提出了值得探索思考的几个问题.     

烤烟直播漂浮育苗综合配套技术研究

烤烟直播漂浮育苗省工省时，可有效减少病虫害的发生，本文从三个方面对该项技：术的技术要点及关键点进行了阐述，并提出了值得探索思考的几个问题。     

黄绵土中不同形态钾含量与烟叶含钾量的关系

对陕西省烟区１００个黄绵土样的基本理化性状和不同形态钾含量进行了测定，并分析了相应的１００个烟样的烟中含钾量，结果表明：１．土壤中水溶态钾，代换态钾，非代换态钾，矿物态钾和全钾的平均含量分别为２１．１，１１５．２，７０１．２，１７ ２９５．１和１８２１６．０ｍｇ／ｋｇ。２．各种形态钾与有机质的呈正相关，水溶态钾与黄绵土物理性粘粒呈显著负相关，代换态钾与黄绵土物理性粘数，ＣＥＣ及水溶态钾呈显著正相关