 |
 |
 |
 |
 |
 |
||
 |
 |
 |
 |
 |
| 5 | 1/1 | 返回列表 |
| 查看: 939 | 回復(fù): 2 | ||
| 當(dāng)前只顯示滿足指定條件的回帖，點(diǎn)擊這里查看本話題的所有回帖 | ||
duanhua2004木蟲 (正式寫手)
|
[求助]
【作物栽培學(xué)】摘要翻譯修改潤色
|
|
|
摘要：【目的】探討在高溫和干旱脅迫下不同水稻品種產(chǎn)量和品質(zhì)形成的特點(diǎn)�！痉椒ā砍Ｒ�(guī)中熟秈稻品種黃華占（耐熱品種）和雙桂1號(hào)（熱敏感品種）與超級(jí)稻品種兩優(yōu)培九（兩系雜交秈稻）和揚(yáng)粳4038（粳稻）種植于盆缽，于抽穗和灌漿早期（始穗后0~10 d）設(shè)置高溫（日最高溫度為37.5℃）、干旱（土壤水勢保持在30±10 kPa）、高溫+干旱3種處理，以同期自然溫度且正常供水為對(duì)照�！窘Y(jié)果】與對(duì)照相比，高溫、干旱和高溫+干旱3種處理均顯著降低了各品種的花粉可育率、受精率、結(jié)實(shí)率和產(chǎn)量；降低了精米率和整精米率和崩解值，增加了堊白米率、堊白度和消減值。高溫及高溫+干旱處理對(duì)產(chǎn)量和稻米品質(zhì)的影響，熱敏感品種大于耐熱品種，超級(jí)稻品種大于常規(guī)品種。干旱對(duì)產(chǎn)量和稻米品質(zhì)的影響，熱敏感品種大于耐熱品種，常規(guī)品種大于超級(jí)稻品種。高溫、干旱或高溫+干旱脅迫對(duì)產(chǎn)量和稻米品質(zhì)的影響與其對(duì)根系氧化力、葉片光合速率和抗氧化保護(hù)酶活性的影響的結(jié)果趨勢一致�！窘Y(jié)論】抽穗與灌漿早期高溫或干旱脅迫對(duì)水稻產(chǎn)量和品質(zhì)的影響在品種間存在很大差異，常規(guī)稻品種的耐熱性強(qiáng)于超級(jí)稻品種，超級(jí)稻品種的耐旱性則強(qiáng)于常規(guī)稻品種。在高溫或干旱脅迫下根系氧化力、葉片光合速率和抗氧化保護(hù)酶活性高是不同類型水稻品種保持較高產(chǎn)量的重要生理原因。 Abstract：【Objective】Heading/flowering and grain filling are the most stress-sensitive periods in rice growth and development. However, little is known that how high temperature and water stress during these periods affect rice yield and grain quality. This study investigated pollen development, yield components, grain quality and some physiological parameters under high temperature and water stress during heading and early grain filling.【Method】Two conventional indica rice cultivars, Shuanggui 1 (heat-sensitive) and Huanghuazhan (heat-tolerant), and two super rice cultivars, Liangyoupeijiu (indica-inclined two-line hybrid) and Yangjing 4038 (japonica), were pot-grown and subjected to high temperature treatments (HT, maximum temperature during the day at 37.5℃), soil drying treatments (SD, soil water potential at -30±10 kPa) and high temperature plus soil drying treatments(HT+SD), and the natural temperature plus well-watered condition was taken as the control(CK).【Result】The results showed that high temperature, soil drying or high temperature plus soil drying treatments significantly reduced pollen fertility rate, fertilization rate, seed-setting rate, grain yield, milled rice, head rice and break down viscosity, increased chalky grains, chalkiness degree and setback viscosity in each cultivars. The effect was more obvious on heat-sensitive cultivars than on heat-tolerant cultivars, and more evident on super rice cultivars than on conventional rice cultivars under either high temperature or high temperature plus soil drying treatments, and the result was reversed under soil drying treatments, and the extent of the decrease or increase was larger for heat-sensitive cultivars than for heat-tolerant cultivars.【Conclusion】These results suggested that high temperature or soil drying treatments during heading and early grain filling reduced yield and grain quality, the declines of which are different for different rice cultivars. Stronger root activity, net photosynthetic rate of the flag leaf and antioxidative defense system would be more important for a heat-tolerant rice cultivar to obtain a higher grain yield better than for heat-sensitive or super rice cultivars under adverse environmental stresses. |
回復(fù)此樓» 猜你喜歡
334分 一志愿武理 材料求調(diào)劑
已經(jīng)有7人回復(fù)
-
275求調(diào)劑
已經(jīng)有18人回復(fù)
-
環(huán)境工程 085701，267求調(diào)劑
已經(jīng)有6人回復(fù)
-
070305高分子化學(xué)與物理 304分求調(diào)劑
已經(jīng)有12人回復(fù)
-
材料與化工272求調(diào)劑
已經(jīng)有12人回復(fù)
-
277跪求調(diào)劑
已經(jīng)有10人回復(fù)
-
化學(xué)工程085602 305分求調(diào)劑
已經(jīng)有19人回復(fù)
-
一志愿北京化工大學(xué)材料與化工（085600）296求調(diào)劑
已經(jīng)有15人回復(fù)
-
085600 286分 材料求調(diào)劑
已經(jīng)有9人回復(fù)
-
南京大學(xué)化學(xué)調(diào)劑
已經(jīng)有9人回復(fù)
duanhua2004
木蟲 (正式寫手)
- 應(yīng)助: 11 (小學(xué)生)
- 金幣: 2914.2
- 散金: 523
- 紅花: 4
- 帖子: 877
- 在線: 479.8小時(shí)
- 蟲號(hào): 1585068
- 注冊(cè): 2012-01-22
- 性別: GG
- 專業(yè): 作物栽培與耕作學(xué)
3樓2012-05-10 16:11:46
duanhua2004
木蟲 (正式寫手)
- 應(yīng)助: 11 (小學(xué)生)
- 金幣: 2914.2
- 散金: 523
- 紅花: 4
- 帖子: 877
- 在線: 479.8小時(shí)
- 蟲號(hào): 1585068
- 注冊(cè): 2012-01-22
- 性別: GG
- 專業(yè): 作物栽培與耕作學(xué)
2樓2012-05-10 10:08:17
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 南京大學(xué)化學(xué)調(diào)劑 +6 | 景隨風(fēng) 2026-03-29 | 9/450 |
|
|---|---|---|---|---|
|
[考研] 299求調(diào)劑 +9 | 15188958825 2026-03-25 | 9/450 |
|
|
|
[考研] 085600，專業(yè)課化工原理，321分求調(diào)劑 +5 | 大饞小子 2026-03-28 | 5/250 |
|
|
|
[考研] 11408軟件工程求調(diào)劑 +3 | Qiu學(xué)ing 2026-03-28 | 3/150 |
|
|
|
[考研] 學(xué)碩274求調(diào)劑 +9 | Li李魚 2026-03-26 | 9/450 |
|
|
|
[考研] 復(fù)試調(diào)劑 +3 | raojunqi0129 2026-03-28 | 3/150 |
|
|
|
[考研] 322求調(diào)劑 +5 | 舊吢 2026-03-24 | 5/250 |
|
|
|
[考研] 331環(huán)境科學(xué)與工程求調(diào)劑 +3 | 熠然好運(yùn)氣 2026-03-27 | 3/150 |
|
|
|
[考研]
 一志愿 西北大學(xué) 總分282 英語一62 求調(diào)劑
+7
|
18419759900 2026-03-25 | 8/400 |
|
|
|
[考研] 材料292調(diào)劑 +12 | 橘頌思美人 2026-03-23 | 12/600 |
|
|
|
[考研] 考研調(diào)劑 +10 | 呼呼？~+123456 2026-03-24 | 10/500 |
|
|
|
[考研] 求調(diào)劑 +3 | 劉柯@ 2026-03-24 | 4/200 |
|
|
|
[考研] 調(diào)劑推薦 +5 | 清酒714 2026-03-26 | 6/300 |
|
|
|
[考研] 341求調(diào)劑 +7 | 青檸檬1 2026-03-26 | 7/350 |
|
|
|
[考研] 一志愿哈工大，085400，320，求調(diào)劑 +4 | gdlf9999 2026-03-24 | 4/200 |
|
|
|
[考研] 材料調(diào)劑 +3 | iwinso 2026-03-23 | 3/150 |
|
|
|
[考研] 上海電力大學(xué)材料防護(hù)與新材料重點(diǎn)實(shí)驗(yàn)室招收調(diào)劑研究生（材料、化學(xué)、電化學(xué)，環(huán)境） +4 | 我愛學(xué)電池 2026-03-23 | 4/200 |
|
|
|
[考研] 一志愿武理085500機(jī)械專業(yè)總分300求調(diào)劑 +3 | an10101 2026-03-24 | 7/350 |
|
|
|
[考研] 333求調(diào)劑 +3 | ALULU4408 2026-03-23 | 3/150 |
|
|
|
[考研] 336化工調(diào)劑 +4 | 王大坦1 2026-03-23 | 5/250 |
|