| 张坤,刘小勇.土壤不同含水量对早酥梨光合特性的影响[J].干旱地区农业研究,2013,31(1):107~111 |
| 土壤不同含水量对早酥梨光合特性的影响 |
| Effects of soil moisture on photosynthetic characteristics of Zaosu pear during fruit expanding period |
| |
| DOI：10.7606/j.issn.1000-7601.2013.01.20 |
| 中文关键词: 早酥梨 果实膨大期 土壤水分控制 光合特性 |
| 英文关键词:Zhaosu pear fruit expanding period controlled soil moisture photosynthetic characteristics |
| 基金项目:农业部西北作物抗旱栽培与耕作重点开放实验室和甘
肃省旱作区水资源高效利用重点实验室（HNSJJ-201103） |
|
| 摘要点击次数: 444 |
| 全文下载次数: 308 |
| 中文摘要: |
| 在田间水分控制条件下，通过对果实膨大期不同水分
处理(W1,土壤含水量为田间持水量的40%±5%；W2，为田间持水量的60%±5%；W3，为田间持
水量的80%±5%)下早酥梨叶片光合的测定发现：上午10∶00， W1、W2、W3的净光合速率(
Pn)出现第一个峰值，分别为18.14、19.43、20.25 μmol·m-2·s-1，到16
∶00，出现
第二个峰值，其中W3可达到17.32 μmol·m-2·s-1，W2、W1分别达到16.47、
14.96 μmol·m-2·s-1，全天，W1、W2、W3分别有5、7、9 h的时间叶片Pn超过12.00 μmol·m-2·s-1； W2、W3的光补偿点(
LCP
)显著低于W1，
而光饱和点(LSP)显著高于W1；W1、W2的最大净光合速率(P
max)无明显差异
，但显著低于W3；W2 CO2补偿点显著
低于W1，与W3无明显差异，W2的CO2饱和点最高，W3 CO2饱和点最低；W2在CO2饱和点
时Pmax显著高于W1，但与W3无明显差异。 |
| 英文摘要: |
| Under controlled soil moisture conditions, the pho
tosynthetic characteristics of Zaosu pear during fruit expanding period were mea
sured. It was found that the net photosynthetic rate (Pn) under the treatmen
ts of W1, W2 and W3 (denoted soil water at 40±5%, 60±5% and 80±5% of field ca
pacity, respectively) appeared the first peak at 10 o′clock, being 18.14
μmol·m-2·s-1, 19.43 μmol·m-2·s-1 and 20.25 μmol·
m-2·s-1 respectively, and appe
ared the second peak at 16 o'clock, being 14.96 μmol·m-2·s-1, 16.
47 μmol·m-2·s-1 and 17.32 μmol·m-2·s-1 respectivel
y. The time of Pn value being more than 12.00 μmol·m-2·s-1
in the whole day under W1, W2 and W3 was 5, 7 and 9 hours respectively. The lig
ht compensation point (LCP) of W2 and W3 was significantly lower than that o
f W1, but the light saturation point (LSP) of W2 and W3 were significantly h
igher than that of W1. There were no significant difference of maximum photosynt
hetic rate (Pmax) between W1 and W2, both being significantly lower th
an W3. The CO2 compensation point of W2 was significantly lower than that of W
1, but there was no remarkable difference between W2 and W3. The CO2 saturatio
n point of W2 was the highest, while that of W3 was the lowest. At CO2 saturat
ion point, the Pmax of W2 was significantly higher than that of W1, bu
t there was no remarkable difference between W2 and W3. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| | |