单季晚粳宁84的品种特性及高产栽培技术要点

宁84系由浙江省宁波市农科院选育而成的单季晚粳稻新品种,适宜在浙江省作单季稻种植。本文对该品种的产量、农艺性状、经济性状、抗逆性、品质及其栽培技术要点进行了综述,以期为宁84的推广应用提供参考。     

林业有害生物灾害小班精确定位坐标系统转换

为了校正林业有害生物GIS信息系统中的林业小班定位误差,使用配准到西安-80投影坐标中的栅格地形图,量取转换区域内均匀分布的地形地物点的西安-80坐标,实地采集这些点的WGS-84坐标,利用三维4参数模型求解从WGS-84坐标到西安-80坐标的转换参数,得到较为精准的定位坐标,在林业有害生物信息管理系统中实现比较准确的林业有害生物灾害小班定位。     

Length of cuttings in juvenile development of a hybrid poplar clone

The influence of length of cuttings on establishment of a short rotation plantation was investigated over a period of two years using direct field planting of unrooted Populus Rasumowskiana cuttings. The longer the cuttings, the higher were the survival and dry mass production. Survival at the end of the second growing season varied from 75% to 97%. In two years, the two longest cutting lengths (40 cm and 50 cm) produced about 100 g dry mass per living cutting; but owing to the higher survival rate of the longest cuttings, there was a difference per area unit: 360 g/m² for 40 cm and 400 g/m² for 50 cm-long cuttings. The shortest (10 cm) cuttings produced only 115 g/m².     

椴树组织培养中污染控制技术初步研究

针对椴树组织培养过程中外植体容易污染，而且难以控制等问题，采用次氯酸钠(商品名为安替福民)对不同季节的外植体进行消毒处理。结果表明：在4～5月份取当年生的嫩茎或萌蘖，其污染率在10％以下；采用水培苗结合10％的安替福民消毒15min 320万单位／L的青霉素 160万单位／L的链霉素浸泡35min，或采用水培苗结合10％的安替福民消毒15min 480万单位／L的青霉素 160万单位／L的链霉素浸泡30min，其污染率为3％。10％的84消毒液处理种子30min或15％84消毒液处理种子20min，污染率为0，效果最为理想。     

种植密度对小麦晋麦84产量及单株农艺性状的影响

为了研究不同种植密度对小麦(Triticum aestivum L.)产量和单株农艺性状的影响,以冬小麦品种晋麦84为试验材料,采用随机区组试验设计,进行等距离4、5、6、7、8、10 cm单子粒点播、条播、宽幅播种密度试验。结果表明,产量随密度增加先升后降,有效穗数随密度增大而增加,穗粒数随密度增大而减少,4和10 cm处理差异达显著水平。小麦苗期单株干物质积累量、分蘖数、次生根数和小麦成熟期单株穗数、主穗小穗数、主穗粒数、主穗粒重、单株生物学产量随密度增加有下降趋势。在适宜播期内晋麦84的合理基本苗密度为230万~340万/hm~2,在此范围内各处理间产量差异不显著,基本苗密度为270万/hm~2的宽幅播种处理产量最高。     

浅谈ArcGIS中坐标系统的转换

介绍ArcGIS软件中的坐标系和投影转换方法.利用MapGIS软件计算出布尔莎模型七参数的转换系数,在ArcGIS软件中实现了北京54高斯克吕格投影坐标系到WGS 84坐标系的转换.数据转换中需经历由北京54高斯克吕格投影坐标系转换到北京54坐标系,再由北京54坐标系转换到WGS 84坐标系.文中具体阐述了同一椭球体及不同椭球体的数据转换.     

Differential mixing action effects on functional properties and polymeric protein size distribution of wheat dough

A micro Z-arm mixer and a 2g-Mixograph were used to compare the effect of pin and Z-arm-type mixing actions on mixing properties of wheat flour dough. Although the two mixing curves obtained with pin- and Z-arm-type mixing action showed a very similar mixing trace, no significant correlation was found between the two mixers other than the number of revolutions required for optimal dough consistency (peak resistance). Mixing requirement was described by a rate-independent parameter, the number of revolutions to peak dough development and was found to be greater in a Z-arm mixer than in a pin mixer. Mixing requirement showed significant correlation with stability, which is therefore a dough strength parameter. The change in the polymeric structure of gluten proteins of dough as indicated by %UPP (unextractable polymeric protein percentage) was monitored and showed a smaller decrease with Z-arm mixing than with pin mixing. Therefore, pin-mixing action is more energetic than Z-arm mixing. At peak resistance, Z-arm mixing gives a larger quantity of polymeric protein content in the dough relative to pin mixing. The degree of dough development at maximum resistance in the different mixers was shown to be different. A new parameter, delta-_UPPMZ${\mathrm{UPP}}_{\mathrm{MZ}}$ (the difference between %UPP of dough obtained with pin vs Z-arm mixing actions) was identified and proposed to have some relationship to the stability of the polymeric proteins in the dough.     

84K杨树耐盐基因转化研究

在已建立了84K杨叶片外植体再生系统的基础上,利用叶盘法首次开展了84K杨双价耐盐基因mtlD/gutD的转化研究,经诱导不定芽及诱导生根阶段卡那霉素(选择性抗生素)连续筛选,获得了16株卡那霉素抗性转化植株.抗性植株经PCR检测,有4株呈阳性.耐盐实验表明,3株阳性植株抗NaCl能力比对照有不同程度提高.PCR及耐盐实验初步证明双价耐盐基因转化获得成功.     

手持式GPS三参数的确定

论述了影响手持式GPS精度的因素,并探讨了如何有效提高手持式GPS精度。着重阐述了空间直角坐标系之间的转换关系,并为实现这一转换进行了实践操作,在转换过程中运用了高斯投影的反变换、大地坐标系与空间直角坐标系之间的转换等诸多理论。成功地解算出了WGS-84坐标系与西安80坐标系之间转换的三参数,并且通过实测检验得到了较高的精度。     

84K杨嫩枝插条育苗快繁技术

84K毛白杨较难生根，硬枝插条育苗1年只能繁育1批苗木，而且需要的种条多。为了提高苗木的繁育速度和产量，适应当前造林绿化的需要，在弥雾条件下进行嫩枝插条育苗获得了成功，并生产了大量苗木。插条生根平均成活率达91．3％，移植平均成活率达87．5％，平均保存率达86．6％。每15～20天即可繁育l批苗木，1年可以繁育6～7批苗木。并总结出快速繁育84K毛白杨的嫩枝插条育苗技术。