利川市山区马铃薯规模化种植的实践与思考

为了探索出一种独具特色的马铃薯规范化、规模化种植模式,基于利川市山区马铃薯规模化种植基地建设情况,结合利川市实际情况,按照优质高效、农旅融合的农业高质量发展要求,对推进马铃薯规模化种植的经验进行总结,提出加强科技支撑、优化发展模式、做好新型职业农民培训、创新管理模式、强化品牌效应的建议。     

Treatment of Septic Arthritis With Acoustic Cavitation and Lavage: A Case Report

A 2-year-old Quarter Horse filly was admitted to our facility with a two-day history of trauma caused by barbed wire on the front face of the right front limb fetlock joint. A septic arthritis was confirmed with the synovial fluid examination. The cytologic evaluation of synovial fluid showed 101,000 leukocytes/mm³, 90% neutrophils, and a total protein concentration of 4 g/dL. It was, therefore, decided to perform an arthroscopic lavage using an ultrasonic device with the tip inserted inside the synovial cavity to exploit the phenomenon of acoustic cavitation. After the removal of the synovial pannus, the probe was left to vibrate in the area near the visible penetrating wound inside the joint until three liters of saline was finished. Further studies are needed for understanding and applying this technology in different equine fields and with different bacterial species. However, these first results are promising for the efficacy of this innovative procedure.     

Stallion Semen Cooling Using Native Phosphocaseinate-based Extender and Sodium Caseinate Cholesterol-loaded Cyclodextrin-based Extender

The objective of this study was to compare semen parameters and embryo recovery rates of cooled stallion semen extended with INRA 96 or BotuSemen Gold. In experiment 1, 45 ejaculates from nine mature stallions were collected, assessed, and equally split between both extenders and then extended to 50 million sperm/mL. Then, the extended semen was stored in three passive cooling containers (Equitainer, Equine Express II, and BotuFlex) for 48 hours. In experiment 2, the same ejaculates extended in experiment 1 were cushion-centrifuged, the supernatant was discarded, and the pellets were resuspended at 100 million sperm/mL with their respective extender. Semen was then cooled and stored as in experiment 1. In both experiments, sperm motility parameters, plasma membrane integrity, and high mitochondrial membrane potential were assessed at 0, 24, and 48 hours post cooling. For experiment 3, 12 mares (n = 24 cycles) were bred with 48 hour–cooled semen from one stallion. Semen was processed as described in experiment 1. Mares had embryo flushing performed by 8-day post-ovulation. In experiment 1, BotuSemen Gold displayed superior total and progressive motility relative to INRA 96 (P < .05). There were no significant differences between the types of containers in any experiment. In experiment 2, INRA 96 and BotuSemen Gold extenders had similar total and progressive motility, but BotuSemen Gold had superior sperm velocity parameters at all timepoints. Embryo recovery was identical for both extenders (50%). Finally, the results obtained herein suggest that BotuSemen Gold is a suitable alternative to be included in semen cooling tests against INRA 96 in clinical practice.     

新疆生产建设兵团第四师71团玉米密植高产全程机械化生产技术模式发展调研

从种植品种、种植密度与种植方式、机械化作业和收储烘干等环节对新疆生产建设兵团第四师71团场玉米生产技术的发展进行调研。分析表明,71团场位于西北灌溉玉米区,通过规模化、标准化生产和统一作业管理,以密植增产为基础、子粒收获为核心、绿色防控与秸秆还田为保障构建的玉米密植高产全程机械化绿色生产技术,实现了高产和高效的协同提高与绿色可持续生产。经农业农村部专家指导组田间测产验收,2012年、2014年和2017年连续创造16701 kg/hm^2、18414 kg/hm^2和18447 kg/hm^2的全国玉米大面积(700 hm^2)高产纪录,净利润在15000元/hm^2以上,为现代玉米生产树立了成功的模式和样板。     

氮、磷添加对不同种植密度樟树幼苗碳储量及其分配的影响

【目的】对氮(N)、磷(P)添加条件下4种种植密度的樟树Cinnamomum camphora幼苗各器官碳(C)含量、储量和分配比例进行研究,以期为氮沉降和磷添加背景下森林碳储量分配格局的变化提供参考。【方法】以1年生樟树幼苗为试验材料,选择氯化铵(NH4Cl)作为氮肥模拟氮沉降,以二水合磷酸二氢钠(NaH_2PO_4·2H_2O)作为磷添加,设置4个水平:不加N和P(对照,CK),加N,加P,加N和P(N+P)。N、P及N+P每年的添加量分别为NH4Cl40 g·m-2、NaH_2PO_4·2H2O 20 g·m~(-2)和NH4Cl 40 g·m~(-2)+NaH_2PO_4·2H_2O 20 g·m~(-2);种植密度设置4个水平,即10、20、40和80株·m-2。【结果】各氮、磷添加和密度处理下幼苗的根、茎和枝的C含量基本上差异不显著,而添加N和N+P能够促使樟树幼苗叶的C含量上升。随着种植密度的增大,樟树幼苗叶片C含量表现出下降的趋势;N、P添加处理基本上能够促进幼苗单株C储量和单位面积C储量的增加;随着种植密度的增大,单株幼苗C储量呈现下降的趋势。【结论】樟树幼苗叶的单株C储量和单位面积C储量分配比例随着种植密度的增大逐渐减小。高密度种植有利于茎的分配比例增加。N+P添加处理对幼苗C储量的促进效果大于单一N或P添加处理。     

日光温室主动采光对不同种植密度番茄光合特性的影响

【目的】研究日光温室在主动采光与普通采光条件下,对其环境以及番茄叶片光合特性的影响。【方法】在主动采光与普通采光的2种日光温室内,设计4、6、8 株/m² 3种不同的番茄种植密度处理,连续3 d(晴天的条件)测得日光温室环境与番茄叶片光合作用的相关数据。【结果】主动采光日光温室环境温湿度、光照辐射方面优于非主动采光日光温室,主动采光日光温室的光照辐射均值较普通采光日光温室在3 d内分别高出了4.39%、5.85%、5.67%;两栋日光温室番茄的净光合速率、气孔导度、蒸腾速率呈现随着密度的增加而减弱的现象,胞间CO₂浓度则相反;就不同采光日光温室而言,主动采光日光温室番茄的光合特性较普通采光日光温室高。【结论】日光温室主动采光在环境以及番茄光合特性方面均优越于普通采光日光温室。     

微生物技术在烟草种植中的应用探究

由于我国科学技术的快速发展，在生物技术领域的研究也取得了很大的进步，微生物技术也 逐渐被广泛应用在农业生产之中。由于微生物可以在土壤中分解一些有害的物质，有效改变土壤环 境，从而促进农作物的生产量以及提供农作物的综合质量，所以也开始在烟草种植中逐步实施。对 此，本文对微生物技术在烟草种植中的应用进行探究，希望能为利用微生物技术进行烟草种植提供参 考作用。     

玉米宽窄行种植技术推广模式研究

玉米宽窄行种植技术在实际应用过程中，不仅可以实现对原有技术的创新和优化，还可以 保证玉米种植的质量、产量和销量。本文针对玉米宽窄行种植技术的推广模式进行分析和研究，为当 地农业可持续发展打下良好基础。     

探析玉米高效种植技术及病虫害防治技术

玉米为我国重要的农业经济作物，高效种植、科学种植能够有效提高玉米产量及品质。本文 分析玉米高效种植技术及病虫害防治技术，总结玉米种植技术经验，供相关人员参考借鉴。     

马尾松种植技术及经济效益分析

在我国林木种植中马尾松生长在气温较高的地区，同时其分布范围相对较广。本文主要针 对马尾松种植技术和经济效益进行了分析。