高番茄红素加工番茄新品种紫红的选育

紫红是利用从日本引进品种NDM969经分离选育的N-131,与分离选育的N-465配制的加工番茄杂种一代.该品种晚熟,较直立,开展度小,可溶性固形物含量高,番茄红素含量高.总产量比对照品种里格尔(87-5)增产6.66;;可溶性固形物含量5.5;,比对照品种里格尔高21.47;;番茄红素含量16.78 mg/100 g,比对照品种里格尔高61.66;,其番茄红素表现尤为突出,适合生产高番茄红色素含量番茄酱.可作为晚熟直播品种栽培.     

微波消解氢化物-原子荧光光谱法同时测定食品中的砷和汞

用微波消解法处理样品,研究快速测定食品中砷和汞的原子荧光光谱法.结果表明,在建立的最佳工作条件下,用氢化物-原子荧光光谱法同时测定食品中砷和汞,砷的检出限为0.42μg/L,汞为0.06μg/L;砷的回收率为95%～105%,汞的回收率为92%～103%,测定结果的RSD均在10%以内,方法的检出限、精密度和准确度均能满足食品检验的要求.     

猪粪堆腐对提高磷矿粉有效性的研究

猪粪与磷矿粉堆腐可以提高磷矿粉的有效磷含量,随着磷矿粉加入量的增加,堆肥中有效磷增加,呈现明显的正效应(1.1%、1.7%、1.9%),但其有效磷占全磷含量的百分数却呈明显的低-高-低的效应(54%、67%、56%),说明堆腐对提高磷矿粉的有效性并非加入量越大越好,试验证明以加入10%的磷矿粉为最好.     

优质稻米的特征与影响稻米品质的因素

一、优质稻米的特征加工品质好,糙米率、精米率和整精米高。食味品质好,香味浓、胶稠度高,糊化温度低。直链淀粉含量低等。外观品质好,透明度高、有光泽,垩白粒率和垩白度低,未成熟的青米,茶色米,乳白米,死米极少。无受害的畸型米,无砂粒等杂质。营养品质好,蛋白质含量高。2006     

棉花缺硼症状

棉花是一种中等需硼、耐硼较强的作物，正常结铃的棉花全株硼含量20～30毫克／千克。在缺硼条件下．花冠缩短，花药和花丝萎缩，花粉畸形、活力下降，棉花会增加蕾铃脱落。影响根尖和生长点分生组织细胞分裂。使根量减少，侧芽丛生，形成多头，造成“蕾而不花”。棉花缺硼症状：     

遮荫处理对‘血红鸡爪械’叶片色素及碳水化合物含量的影响

研究了不同遮荫处理对鸡爪槭的栽培变种‘血红鸡爪槭’叶片叶绿素、花色素苷以及糖和淀粉含量的影响，结果表明：随着光照强度的减弱，‘血红鸡爪槭’叶片中叶绿素a、叶绿素b、总叶绿素以及类胡萝卜素的含量都增多．但光强太弱含量反而会降低；叶片中花色素苷、糖以及淀粉含量随着光照强度降低而减少。     

毫州市土壤地力水平状况及培肥施肥对策

1土壤地力水平状况 1 1地力水平有所提高测定结果为：土壤有机质平均含量L.47％．全氮含量0．11％．碱梓氮75．9mg／kg五氧化二磷为25．1mg／kg，氧化钾为183．3mg／kg，参考《安徽省平原砂姜黑土、潮土耕地类型区耕地土壤地力等级定级体系与结果》养分含量指标，综合分析得知：我市土壤养分水平有机质逐年提高，达到中等偏上，平氯，高磷，中等佩高钾。     

生长季桃枝条与叶片花青素含量的动态变化

采用分光光度法测定花青素含量，研究了4个桃（Prunus persica （L.）Batsch．）品种在生长季中一年生枝条与叶花青素含量的动态变化。结果表明：4个桃品种在生长季中一年生枝条的平均花青素含量在0．52～0．59mg／g鲜重之间，以品种“杨屯巨桃”最高，“颐红水蜜”次之．“大仙桃”最低，且4个品种一年生枝条的花青素含量在8月中旬均达到最低值，8月中旬以后逐渐呈上升趋势；4个桃品种在生长季中叶的平均花青素含量在0．64～0．69mg／g鲜重之间．以品种“杨屯巨桃”最高．“颐红水蜜”次之．“大仙桃”最低，且4个品种叶的花青素含量在8月中旬均达到最高值．8月中旬以后逐渐呈下降趋势。     

Dynamic Changes in the Calcium Content of Several Apple Cultivars During the Growing Season

Dynamic changes in calcium content were investigated in eight apple cultivars. The results showed that the calcium concentration in leaves and shoots increased with fruit development. The cultivars displayed only a small difference in the calcium concentration during the early stage of development, the difference became very significant at the late stage of development, especially in shoots. In shoots, for example, calcium content was highest in Starkrimson （19 638.6 mg kg^-1） and lowest in Fuji （8 751.3 mg kg^-1）. Calcium concentration was highest in young fruits and was found to decrease with the growth of fruit, and was characterized by a dramatic drop at the rapid expansion stage. There was a significant difference among cultivars. Young Starkrimson fruits contained the highest calcium concentration of 506.52 mg kg^-1 among cultivars tested, followed by Pink Lady and Fuji. The calcium concentration in mature fruits from high to low is as follows： Starkrimson, Sansa, Pink Lady, Senshu, Gala, Fuji, Red General and New Century. In this study, it was found that eight cultivars continuously assimilated calcium during the whole growing season, especially at the young stage when fruit took up 35-46% of total calcium. The calcium content in fruitlets was low in all cultivars; in the expansion stage, there was rapid absorption of about 30% of total calcium, whereas in the ripening fruit, content of calcium was reduced. The calcium accumulation increased with fruit growth in stalk, similar to that in fruit.     

不同浓度IAA对烤烟酶活性及钾和烟碱含量的影响

采用盆栽试验,研究了打顶后喷施不同浓度IAA对烤烟叶片中硝酸还原酶(NR)、转化酶(Inv)活性,根系活力及烟叶中钾和烟碱含量的影响.结果表明:打顶后喷施适宜浓度的IAA(20 mg/kg)可以增加烟叶NR活性,减缓烟叶Inv活性下降程度,有利于提高根系活力,增加烟叶钾含量,同时具有降低烟碱含量的作用.