【摘 要】
：
Plastic film mulching affects changes in nutrient contents in soil and absorption and utilization of nutrients in plants were by changing hydrothermal condition of soil. The temporal and spatial variation of the total soil salt and nutrient contents with
【机 构】
：
Xinjiang Academy of Agricultural and Reclamation Science,Shihezi 832000,Xinjiang,China;Key Lab of Xi
论文部分内容阅读
Plastic film mulching affects changes in nutrient contents in soil and absorption and utilization of nutrients in plants were by changing hydrothermal condition of soil. The temporal and spatial variation of the total soil salt and nutrient contents with mulch film removed at three different times during the early cotton growth stage and its effects on nutrient absorption and accumulation in cotton plants were studied over 2015-2017. The film removal treatments reduced salt accumulation in normal rainfall year (2017). Film removal increased contents of soil organic matter, the total phosphorus and available potassium at the end of growth stage, increased contents of soil hydrolyzable nitrogen and the total nitrogen in the surface soil layer (0-10 cm), and increased the total nitrogen contents in the deep soil layer (40-50 cm). Film removal increased accumulation of nitrogen and phosphorus nutrients in cotton plants in 2017 and accumulation of nitrogen, phosphorus and potassium nutrients in cotton plants in heavy rainfall year (2016). These experimental results indicated that removal of mulch film at an appropriate and targeted time in the bud stage of cotton promoted nutrient absorption.
其他文献
为研究石河子地区不同收获期青贮玉米(Zeamays L.)农艺性状、发酵品质以及筛选当地最佳栽培品种.以11个玉米品种为材料,试验采用随机区组设计,在1/4,1/2,3/4 乳线和完熟期测定农艺性状并调制青贮,同时测定青贮品质和体外消化率,利用模糊相似优先比方法综合评价.结果表明:不同收获期青贮玉米农艺性状、营养品质差异显著(P＜0.05),收获期和品种对其营养品质影响显著(P＜0.05).随收获期推进各青贮玉米农艺指标先升高后降低,3/4乳线达到最高,干物质(Dry matter,DM),可溶性碳水化合
Soybean (Glycine max) is short-day (SD) plant. Flowering time is a key agronomic trait that determines the transition from vegetative to reproductive growth. The study on the expression and regulation mechanism of flowering time gene in soybean photoperio
本研究以\'中苜1号\'苜蓿和gfp-Sm1021根瘤菌为试验材料,设置3个接种量和2种接种方式,通过温室试验探究接种量和接种方式对苜蓿根瘤菌结瘤固氮的影响.结果表明:提高接种量能增加苜蓿结瘤数、地上生物量和蛋白含量,降低地下生物量.接种量增加到(1.9×105)个·株-1后,种子接种处理中,继续增加接种量不能提高结瘤数;沟施接种处理中,继续增加接种量能增加结瘤数但降低地上生物量.相同接种量下,沟施可提高苜蓿的结瘤数,增加的根瘤主要位于0～4 cm侧根、4～8 cm主根、4～8 cm侧根和8～12
Two-dimensional(2D)layered perovskites have emerged as potential alternates to traditional three-dimensional(3D)analogs to solve the stability issue of perovskite solar cells.In recent years,many efforts have been spent on manipulating the interlayer orga
Carrier separation in a solar cell usually relies on the p-n junction.Here we show that an n-n type inorganic semicon-ductor heterojunction is also able to separate the exciton for efficient solar cell applications.The n-n type heterojunction was formed b
The dilute magnetic intermetallic compound(DMIC)is an extended study of the dilute magnetic semiconductor.The giant magnetic effect and room temperature ferromagnetism are induced by doping minor 3d transition metal into REIn3 intermetallic compound.Owing
Due to excellent thermal stability and optoelectronic properties,all-inorganic perovskite is one of the promising can-didates to solve the thermal decomposition problem of conventional organic-inorganic hybrid perovskite solar cells(PSCs),but the larger v
推动“双减”更加落实落地rn民进中央副主席、上海市政协副主席黄震委员:第一,做好“双减”政策的解读和宣传工作,广泛凝聚社会共识.第二,政府及相关部门应出台相关政策,完善基础教育保障体系,增加师资供给、加大教师培训力度、完善公益性在线教育平台建设、整合社会教育资源等,切实强化学校育人主阵地作用.第三,深化教育综合改革,促进“双减”政策产生实效.既要深入推进以素质和能力为核心的考试招生制度改革,也要扩大优质教育资源供给,全面推进义务教育优质均衡发展,同时还要完善普职分流政策,提升职业教育适应性.
Among all the known electrode materials,vanadium pentoxide(V2O5)has high reversible capacity.It is a very valuable material for research of the complexity,rich structure and morphology.However,it also has some disadvantages,such as poor cycle stability,lo
Potato spindle tuber viroid (PSTVd) disease is one of the major diseases that threatens potato production. Therefore, an advanced, rapid and sensitive detection technology is needed to detect the disease for better control. In order to establish an easier