结实率英文

特性：西瓜主根系，主根深1米以上，根群主要分布在20厘米--30厘米的耕层内，根纤细易断，再生力弱，不耐移植。幼苗茎直立，4--5节后间伸长，5--6叶后匍匐生长，分枝性强，可形成3--4级侧枝。叶互生，有深裂、浅裂和全缘。雌雄异花同株，主茎第3--5节现雄花，5-7节有雌花，开花盛期可出现少数两性花。花冠黄色。子房下位，侧膜胎座。雌雄花均具蜜腺，虫媒花，花清晨开放下午闭合。果实有圆球、卵形、椭圆球、圆筒形等。果面平滑或具棱沟，表皮绿白、绿、深绿、墨绿、黑色，间有细网纹或条带。果肉乳白、淡黄、深黄、淡红、大红等色。肉质分紧肉和沙瓤。种子扁平、卵圆或长卵圆形，平滑或具裂纹。种皮白、浅褐、褐、黑或棕色，单色或杂色。种子千粒重大籽类型100克--150克、中籽类型40克--60克、小籽类型20克--25克。子瓜类型150克--200克。

O(∩_∩)O~土壤含水量、soil water content弱碱性土质、mildly alkaline soil干旱筛选、drought screen干旱胁迫、drought stress好的结实率、better seed setting rate苗期、seding stage抽穗期、heading date分蘖期、tillering date够专业吧？！

西瓜中含有丰富的营养物质，如果糖、蔗糖、葡萄糖、丙酸、丙氨酸、瓜氨酸、谷氨酸、精氨酸、苹果酸、磷酸、盐类和胡萝卜素、维生素以及钙、磷、铁、钾等矿物质。在每百克西瓜汁中，含蛋白质1.2克，碳水化合物4克，粗纤维0.3克，钙6毫克，磷10毫克，铁0.2毫克，胡萝卜素0.17毫克，维生素B10.02毫克，维生素B20.02毫克，烟酸0.2毫克，维生素C3毫克。营养丰富。西瓜是防暑降温的最佳果品，西瓜的含水量高达94%，在所有水果中天然营养汁含量居首位，因此，被称为“夏季瓜果之王”。盛暑吃西瓜，可以防暑降温、促进食欲、增加营养、帮助消化。西瓜最好现吃现切，冷藏最好不超过3个小时，因为冷藏时间太久或变质的西瓜，容易伤害脾胃，引起各种肠道疾病。无子西瓜和有子西瓜一样，果实中含水分90%左右，故有“水瓜”之称。英文中的Watermelon是“水瓜”之意。西瓜含有多种营养成分和化学物质。据分析，西瓜果肉中含有蛋白质、糖、粗纤维、钾、磷、钙、铁、钠、镁氯、尼克酸、维生素A、维生素B1和维生素B2。在西瓜汁中还含有瓜氨酸、丙氨酸和谷氨酸等多种氨基酸，苹果酸及其它有机酸、果胶和少量糖苷，以及枸杞碱、甜茶碱等多种生物碱等。西瓜汁多味甜，能解热消暑，除烦止渴，是人们喜爱的消暑佳品。由于西瓜含有多种营养成份和化学物质，随着人们生活水平的不断提高，西瓜已不再是季节性消费品，而逐渐成为营养食品。据分析500克西瓜果肉所含的蛋白质和糖，相当于56克小麦产生的热量（约83.7千焦),能够为人体正常的生理活动提供能量.研究表明,西瓜还具有调整体力,提高耐力的作用。西瓜果肉中所含的维生素、各种糖，矿物质和有机酸，是人体构成骨骼、血液不可缺少的成分

th是钍的化学元素符号。

钍是一种放射性金属元素，带钢灰色光泽，质地柔软，化学性质较活泼。钍经过中子轰击，可得铀-233，因此它是潜在的核燃料。钍广泛分布在地壳中，是一种前景十分可观的能源材料。

扩展资料

钍以化合物的形式存在于矿物内（例如独居石和钍石），通常与稀土金属连系在一起，天然存在钍的是质量数为232的钍同位素。

世界各国已探明的独居石储量达几百万吨。随着各国对钍矿的勘探力度的加大，钍的探明储量也在一直增加。截至2000年，全世界独居石产量约78万吨。巴西是最大的钍资源国，其次是土耳其，加拿大和美国。

我国钍资源比较丰富，据不完全统计。20多个省和地区都已发现具有相当数量的钍资源。2005年中国科学院的资料显示，内蒙古白云鄂博矿区钍储量约为22万吨，占全国钍矿产储量28.6万吨的77.3%。

参考资料来源：百度百科-钍

Sunflower (English: Sunflower Helianthus annuus scientific name: Japanese name: ヒ マ ワ リ), alias xiangyanghua, is a type of up to three meters of large scale annual compositae Sunflower plant. The disc inflorescence can kuanda 30 centimeters. Because the inflorescence with sun rotating the name. Sunflower stems can last for 3 meters, the composite can reach 30 centimeters.Morphological characteristics1 was born in herb, 1 ~ 3 meters high. (for hybrids also have half a metre high. Vertical stem, stout, rounded edges and corners, be more white thick hard wool. Leaves alternate, usually heart shapeOvate or ovoid, apex acuminate, sharp ashdod or a gileadite from 3 arteries and veins, with thick serrated edge, two sides coarse, coat, having a long handle. Inflorescence, great, 10 ~ 30 cm in diameter, solitary in stem top or branch end, often downward inclined. Total bracts multilayer, leaf qualitative, overburden tegular arrangement, by long horklumps, summer flowering, inflorescence edge born yellow tongue fluted, without fruit. Inflorescence of central for both sexes GuanZhuangHua, brown or purple, strong. Fruit an achene, obovate or oval oblong, slightly compressed pressure, peel woodiness optimization, grey or black color, commonly known as sunflower seeds. Sexual xi warm, drought. Originated from North America, all over the world are cultivated.Sunflower component partsSunflower plant by roots, stems and leaves, flowers, fruits five parts. (a) the root sunflower, lateral root and commercial taproot regarding composition. Taproot acorns deep, it is commonly 100 to 200 centimeters; Lateral root from taproot horizontal direction on brought forth, grow. Lateral root grows on many regarding. Lateral root regarding bears the hair. Sunflower root developed in soil wide distribution and deep, including some 60% of the root distribution in 0 ~ 40 centimeters in soil. Sunflower root growth rate has been than stem fast, anxle before and after the formation of the fastest, root growth to seeds begin to maturity, root no longer grow, after he gradually wither. In addition, in suitable conditions can grow large amounts of water roots (like corn gas root). (2), erect stems stalks circular rough surface and have bristles. Stem by cortex, xylem and spongy marrow component. Growth anaphase, stalks, and stems of woodiness hip is formed within the hollow. Sunflower, the embryo stem with green, Dan zi, deep purple etc, it is an important symbol of seedling recognition varieties. Stem height, different types of varieties, the same breed bigger differences, height by sowing and cultivation condition the influence, difference is very big also. Stem's growth rate from budding to flowering to grow the fastest, at the height of the total height about 55%, later growth slowed, only 5% or so. Sunflower branch of the sex, one kind is decided by genetic after one kind is caused by environmental conditions. (3) leaves sunflower leaves into cotyledons and true leaf. Cotyledons couple. True leaf in the stem bottom 1 ~ 3 quarter is often opposite, above is alternate. True leaf is relatively large, hairy, and petiole bears the short and hard bristle, and reviewed a waxy layer. Leaf number for varieties vary, precocious kind of general for 25 ~ 32 pieces, mature for 33 ~ 40 sheets. Stem the lower leaves in before blossomming food-making, main supply root growth, when its function basically end flowering. Upper the blade manufacture nutrient main supply anxle prompted seed formation. (4) flower sunflower for inflorescence, bears in the stem apex, commonly known as the plates. Its shape is convex, flatten and concave under three types. There are two anxle flowers, namely tongue fluted and GuanZhuangHua. Tongue fluted 1 ~ 3 layers, bears the anxle around the edge, for asexual flowers. Because of its color and size varies, there are varieties, weak yellow, orange and purple, have deceived insects come flower-counting pollination effect. GuanZhuangHua, located in tongue fluted inside, for both sexes flowers. Corolla color has yellow, brown, dark purple, etc. (5) fruit, fruit for fruit an achene habit called seeds. Fruit including peel, kind of skin, cotyledons and embryos four parts. Edible type seeds longer, peel black and white stripe majority, peel thick, accounting for approximately seeds weight of 40%, and 1000-grain weight of 100 to 200 grams. Oil is short, with type seeds for black rind, thin skin, about seeds weight of 20% ~ 30% and 1000-grain weight 40 ~ 110 grams.Recorded in the ancientSunflower about in the Ming dynasty introduced to China, and now know the earliest recorded sunflower literature for the Ming dynasty people WangXiangJin with the qunfang spectrum "(1621), the book there's" sunflowers "a, only in the HuaPu three * chrysanthemum" in the attached "zhangs chrysanthemum"; the original is as follows: "zhangs chrysanthemum - name this zavan chrysanthemum - name meet Yang flower, stem long more than 100zhang Kennedy, such as bamboo culm coarse linen, how straight inproper born, although have branches, and only give birth to a large flowers such as dish dishes, single color yellow heart all make life such as the honeycomb shape, to fall gradually purple black and strong, take the son of very easily, flower toxic can abortion". "The name of the dispute", in the WenZhenHeng ChangWu volunteers "(about 1635 years). 1820 XieFang in the flowers and trees small ambition "in speech is full of sunflower, already but viewing, and edible. Explain sunflowers in China widely planted.The poet's sunflower psalmSuccessive poet, write a sunflowers psalm opposite less, every scholarships-from and, more loyal thought: "reposing in flowers for beauty, men have coring dispute. Gu loyal servant, if such a virtuous adjectivals." Lee Zan of these four poem, can be represented. The formation of his poems in summer the guest has: "no more LiuXu because of the wind, but the sunflower dispute pour." Xu HuaMing volunteers tells of personality. "Sunflower", Canon out dispute pour the three · Chen WangZhi biography: "if the sloping leaves, kwai herb sun although not for the return of light, but eventually to those cheng also." Du fu also has "kwai herb pour the sun, petrophysical property solid mo takes" verse. Qi chuas "sunflower" or "most frets point in Chen Dan, not for setting the shadow will move." LiuChangQing "to sing wall Yin kwai" cloud: "here often WuRi, qing qing alone in Yin. The sun is not inferior, the partial weiyuan." For loyal sunflower justifications, was so thoughtful.Growth habitSunflower four seasons are acceptable, mainly in summer and winter seasons give priority to. Flowering can reach two weeks or more. Sunflower except appearance resembles the sun outside, her flowers bright and easy, suitable for viewing place adorn, her seeds have economic value, not only can finish popular sunflower seed, more but pre-pressed low cholesterol senior edible oil arrived. Sunflower varieties can be divided into general ornamental USES "breed or" edible "varieties, general ornamental plants with varietal character for more