叶面宝浸拌种对玉米生长发育及产量的影响

为探讨叶面宝对玉米生长和产量的影响，进行了不同浓度药剂浸种和拌种处理的田间试验。结果表明：采用不同浓度叶面宝浸拌种都可不同程度地提高玉米产量，１０００倍液、２０００倍液、４０００倍液浸种和２００倍液拌种处理较对照分别增产１７．９％，７．４％，３．０％和１６．７％，１０００倍液浸种和２００倍液拌种的增产效果达到显著水平。同时，用叶面宝液浸拌玉米种子可提高发芽率，促进苗期生长和植株干物质积累     

浅谈精准农业与农业可持续发展

世纪之交,精准农业成为农业高新技术应用研究的“热门”课题。本文认为实施精准农业是促进农业可持续发展的有效途径,必将对我国农业生产产生重大影响。根据我国是1个农业大国,农业是国民经济基础产业的国情,剖析精准农业发展的理论基础和技术体系,探讨我国推进精准农业的难点及应采取的措施具有重要的意义。     

Farm and Operator Characteristics Affecting the Awareness and Adoption of Precision Agriculture Technologies in the US

Precision agriculture (PA) technologies have been commercially available since the early 1990s. However, not only has the pace of adoption in the US been relatively modest but a surprisingly large number of producers are not familiar with these technologies. Using farm level survey data, this study quantifies the role that awareness plays in the decision to adopt PA technology and allows us to explore the potential for public or private information programs to affect the diffusion of PA. PA adoption and awareness are modeled as jointly determined dichotomous variables and their determinants are estimated using a two-stage (i.e. instrumental variable) logistic specification. The first-stage logit model indicated that operator education and computer literacy, full-time farming, and farm size positively affected the probability of PA awareness while the effect of age was negative. Grain and oilseed farms (i.e. corn, soybean, and small grains) and specialty crop farms (i.e. fruits, vegetables, and nuts) as well as farms located in the Heartland and Northern Great Plains regions were most likely to be aware of PA technologies. The second-stage PA adoption logit model, which included an instrumental variable to account for the endogeneity of awareness, revealed that farm size, full-time farming, and computer literacy positively influenced the likelihood of PA adoption. Grain and oilseed farms were the most likely types of farms to adopt PA as were farms in the Heartland region. Awareness, as defined in this study, was not found to be limiting the adoption of PA, suggesting that farmers for whom the technology is profitable are already aware of the technology and that a sector-wide public or private initiative to disseminate PA information would not likely have a major impact on PA diffusion.     

黑糯玉米面粉磷酸单酯制备及性质的研究

研究了制备黑糯玉米面粉磷酸单酯的最佳工艺条件，并测试了其主要特性。试验结果表明：在pH值6．5、NaH2PO4与面粉配比为0．19、反应温度为130℃，反应时间为1h的工艺条件下制备的产品效果最好，粘度最高。糊粘度和冻融稳定性达到了黑糯玉米淀粉的水平。     

苏玉19优质高产关键制种技术研究

苏玉19是江苏沿江地区农科所以自选系T458作母本,自选系T877作父本,杂交育成的高产优质早熟大穗型饲用玉米新品种.为提高制种产量,保证种子质量,通过观察亲本自交系特征特性,分析各种影响制种产量和质量的单项因素,结合制种实践,进行组装配套,形成苏玉19优质高产制种配套技术.     

玉米显性高油基因存在的若干证据

通过来源不同的20个高油系和5个普通系杂交当代和后代籽粒油分花粉直感效应及遗传分离特点分析，发现N1680高油系的杂交当代籽粒和F2籽粒油分含量接近于高油亲本，表现出显性基因的遗传特征；同时，F2籽粒油分还存在明显的超高亲优势。因此推测该系可能存在显性高油基因，并与其他基因存在互作效应。     

新型水稻钵体摆栽秧盘及秧盘注塑模具的设计

通过对现有水稻钵体摆栽秧盘结构的改进设计,可以大大提高秧盘的使用寿命,并设计出用于改进后的秧盘生产用的注塑模具。     

高赖氨酸玉米（Opaque－2）数量性状的遗传研究

研究了１７个高赖氨酸玉米（Ｏｐａｑｕｅ－２玉米，简称Ｏ－２玉米）的数量性状遗传，并应用三倍体模型对籽粒的主要性状遗传效应进行了研究。采用ＭｉＮＱＵＥ（１）估算方差分量以及预测遗传效应值方法分析了双列杂交试验资料，遗传估算方差结果表明，籽粒长度、宽度、厚度、百粒重、赖氨酸含量（Ｌｙｓｃｏｎｔｅｎｔ）和每粒赖氨酸含量（Ｌｙｓ／Ｇｒａ）都受母体植株基因和细胞质基因控制，另外，这些性状都容易受非遗传因素的影响。遗传效应预测值分析表明，籽粒性状上直接效应不明显，最主要效应是母体加、显性效应和细胞质效应，在某些性状上细胞质效应和母体效应方向相反，因此，在育种工作中必须考虑效应的重组，选择适当的杂交组合。在本实验所研究的性状中，只有籽粒百粒重杂种优势比较明显。     

早熟高产春玉米新品种绥玉12的选育利用研究

中早熟高产春玉米新品种绥玉12由黑龙江省农科院绥化农科所玉米育种研究室于1998年以自交系绥系604为母本,以偏硬粒自交系绥系701为父本杂交育成的,2005年1月通过黑龙江省农作物品种审定委员会审定。该品种适应区生育日数112d,需≥10℃积温2140℃,与克单8号同熟期。该品种具有高产稳产、粮食产品商品品质好、耐旱性、抗病抗逆性及适应性强等特点,适宜黑龙江省第三积温带下限种植。     

河南省几个玉米群体的综合分析与评价

对河南省11个玉米群体进行了产量等性状的综合分析,建议许白群和洛孟综、525群和二南24群作为相互群体继续改良,同时可作为综合种利用。结果表明群体出籽率、千粒重、穗粗等与产量间、GCA 间及其SCA 间均相关显著;群体穗长、穗粗,穗行数、出籽率、株高、穗位高等亲子相关显著。同时对与群体改良有关的问题进行了讨论,并扼要介绍了多点不完全双列杂交的配合力分析方法。