金平县林产业发展探讨

金平县2007年林业产值为1．91亿元，占全县农业总产值的35％，是林业重点县．该县具有发展林产业的优势项目，包括橡胶种植业、竹藤产业、木本油料（油荼）业、核桃特色经济林产业、杉木珍贵用材林产业以及草果林下资源开发等．分析了林产业发展的有利和不利因素．进行了产业发展规划和布局．提出加快集体林权制度改革、加大资金投入、加强科技支撑、扶持龙头企业、组建专业合作组织等保障措施．     

Variability in the composition of lupin (Lupinus angustifolius) meals influences their digestible nutrient and energy value when fed to rainbow trout (Oncorhynchus mykiss)

Over a series of seven separate experiments 76 different lupin (Lupinus angustifolius) meals were assessed for their digestible dry matter, protein, amino acid and energy characteristics when fed to rainbow trout. Two reference diets (a common basal diet and a reference lupin meal) were also included in each experiment. Minimal variance in the digestibility parameters of both reference diets was observed among the experiments ensuring that there was a high degree of robustness in the across-experiment evaluations. Using simple and multiple-regression techniques, principal diet and ingredient composition factors affecting diet and ingredient digestibilities and ingredient digestible values were explored within the dataset. Using simple linear regression, it was shown that nitrogen digestibility of the lupin meals was negatively influenced by ingredient lignin content, but positively affected ingredient protein (N × 6.25) content. The energy digestibility of the lupin meals was positively affected by a range of compositional features including protein, sum of amino acids and negatively affected by carbohydrate content. The digestible nutrient and energy content of the meals reflected the combined effects of both ingredient digestibilities and ingredient composition. The digestible nitrogen content of the lupin meals was positively affected by protein (N × 6.25), sum of amino acids and energy content, but was negatively affected by lignin and carbohydrate content. The digestible sum of amino acids was also positively affected by protein, sum of amino acids, but only negatively affected by carbohydrate content, not lignin content. The digestible energy content of the lupin meals was also positively affected by protein, sum of amino acids and their own energy density, but only negatively affected by carbohydrate content. Multiple linear regression modelling supported that together ingredient protein and lignin content were the strongest predictors of digestible protein value, explaining close to 60% of the variability in this parameter. Discrete reassessment of these relationships using non-linear analysis methods provided a stronger interpretation of the ingredient composition effects. In recognition of this, a functional model including terms for ingredient protein and lignin content on the digestible protein value was defined. This study demonstrates that within one raw material type that not only does significant variability in the digestible value of the raw materials exist, but that it is possible to identify compositional features of that raw material that are intrinsically influencing their own digestible value.     

密山地区麻类作物田节肢动物种类构成调查初级

为了更好地开展对经济作物田害虫的综合治理工作,进行了麻类作物田节肢动物的种类构成调查。田间调查和室内鉴定结果表明：密山裴德地区麻类作物田节肢动物种类有45种,分别属于3纲、12目、30科。     

大豆高效利用磷素基因型的筛选

田间条件下选择226个大豆品种(系),在不同磷水平下测定其产量、百粒重。株高、分枝和节数变化规律。以这五种指标的系统聚类分析结果表明,供试大豆基因型可以划分为四种类型。结合产量的变化双重筛选,得到43种对磷素敏感性不同的基因型;第二年用同样方法进行筛选,认定了5种磷高效基因型和4种磷低效基因型。     

草类在生态果园建设中的作用

从生态学角度综述了草类在生态果园建设中的作用，并总结其在果园土壤、果园微域环境、果树生长的影响等方面国内外近年来研究的新进展。结果表明：果园生草可有效改善果树生态环境，调节地温，提高土壤肥力和蓄水保墒能力；同时有利于增加害虫天敌数量，减轻病虫害和生理病害的发生，减少果园农药的使用量。     

中国粮食生产波动的特征及波因分析

本文确立１９５２～１９９５年的粮食趋势产量作为分析粮食波动的基准线，根据当年粮食实际产量与趋势产量的增长率来研究我国粮食生产的波动特征，在此基础上分析我国粮食波动的主要原因，旨在通过研究粮食生产的波动规律，分析粮食生产的波动原因，进而达到控制波动的目的。为政府科学地指导我国的粮食生产提供决策依据。     

两种不同穗型水稻的籽粒灌浆特性分析

以直、弯两种穗型水稻各1份材料为试材,通过剪叶与疏花措施,改变灌浆进程,研究了源库关系对水稻籽粒灌浆特性的影响。结果表明,不同穗型水稻籽粒灌浆进程可用Richards进行拟合,从而可以用朱庆森等提出的有关参数对灌浆特性进行解释。剪叶降低水稻籽粒的灌浆速度和终极生长量,导致结实率低,籽粒充实度差,千粒重小而减产,而疏花(剪穗)则相反。     

小麦中微量元素测定方法的研究

本实验对小麦中多种微量元素测定所采用的样品处理方法，溶液酸度，以及共存元素的影响进行了研究，为选择最佳分析条件提供了依据。     

播期对大豆开花及产量的影响

通过对不同播期条件下大豆开花结英规律的调查，建立了大豆开花模式，结果表明，在大豆开放小花数量累积的概率与开花日序呈对数函数关系。回归模型为：ＹＰ＝Ａ＋Ｂ．Ｌｎｘ；确定了不同播种时期处理的，“有效花期”范围；分析表明“有效花期”较长，落花落英率较小，产量罗高。“有效花期”长短与结英率及产量具有一定的相关关系，不同处理的产量差异达极显著水平。     

Water management and crop production for food security in China: A review

Food security is a high priority issue on the Chinese political agenda. China’s food security is challenged by several anthropogenic, sociopolitical and policy factors, including: population growth; urbanization and industrialization; land use changes and water scarcity; income growth and nutritional transition; and turbulence in global energy and food markets. Sustained growth in agricultural productivity and stable relations with global food suppliers are the twin anchors of food security. Shortfalls in domestic food production can take their toll on international food markets. Turbulence in global energy markets can affect food prices and supply costs, affecting food security and poverty. Policy safeguards are needed to shield food supply against such forces. China must make unremitting policy responses to address the loss of its fertile land for true progress towards the goal of national food security, by investing in infrastructure such as irrigation, drainage, storage, transport, and agricultural research and institutional reforms such as tenure security and land market liberalization. The links between water and other development-related sectors such as population, energy, food, and environment, and the interactions among them require reckoning, as they together will determine future food security and poverty reduction in China. Climate change is creating a new level of uncertainty in water governance, requiring accelerated research to avoid water-related stresses.