Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Accueil du site → Doctorat → Chine → 2010 → The Growth Characteristics and High Water Use Efficient on Mature Grape under Extremely Drought Region

Graduate School,Chinese Academy of Sciences (2010)

The Growth Characteristics and High Water Use Efficient on Mature Grape under Extremely Drought Region

Zeng Chen

Titre : The Growth Characteristics and High Water Use Efficient on Mature Grape under Extremely Drought Region

Auteur : Zeng Chen

Grade : Doctoral Dissertation 2010

Université : Graduate School,Chinese Academy of Sciences

Résumé partiel
The Turpan study site represented traditional farming clay loam soil. This soil has a better retain of water and nutrients and poor water conductivity. The soil has a relatively low hydraulic conductivity and relatively high diffusion rate. The irrigation model should take as "less time large amounts", and the emitter should take a small discharge rate and large emitter spacing. The Shanshan study site represented Gobi desert improved gravel sandy loam soil. This soil and a poor water retain and fertilizer, and easy to produce deep leakage. This kind of soil has a relatively high hydraulic conductivity and relatively low diffusion rate. The irrigation model should take as "several time small amounts", and the emitter should take a large discharge rate and small emitter spacing.The variation of grapevine length was small and can be ignored during the study periods. The number of branches, branch length, branch internode length, number of grape leaves, average leaf midrib length, and average leaf area and ground net biomass growth was increased rapidly in the shoot growing period. After flowering period, the growth rate gradually becoming slowly and the variation become slightly after the fruit enlargement period. The branch diameter growth rate was smaller in the shoot growth period, the growth rate accelerated in flowering and fruit enlargement period, and the speed gradually slowed down in the late fruit enlargement period. Grape leaf area index increases rapidly in the leaf expansion period, grape leaf area index began to slow down after flowering period and reached maximum value in grapes harvest period of one year. Leaf area index decreased rapidly thereafter, until the buried pier. The leaf chlorophyll content of mature grape showed chlorophyll a> chlorophyll b. The chlorophyll content showed no significant differences among high, middle water treatments and furrow irrigation treatment, but the chlorophyll content was significantly smaller for the low water treatment. Chlorophyll content in different position showed mature leaves for welcome light > backlight for mature leaves> welcome light for young leaves.The longitudinal diameter, transverse diameter and single berry volume of grape fruit increases rapidly after fruit-development stage, and then slow down after fruit mature stage, but increased rapidly again before the harvest, showed a fast-slow-fast growth trend. The grape fruit sharp index decreased rapidly after fruit-development stage, and became stable after fruit mature stage. Grape sharp index were between 1.25-1.41 under different water treatments. Grape sugar increased after fruit-development stage, and increased rapidly after fruit mature stage, then slow down before harvest, showed a slow - fast - slow the trend. The grape sugar content expressed upper string> string middle> lower strings in same cluster and expressed as top> bottom > middle in same vine.The distribution of grape roots for Shanshan improved sandy loam area showed relatively wide range. The maximum depth of vertical distribution was more than 1.4 m, and the maximum density presented at 40-60 cm. The horizontal root distribution was covering almost the whole ridge and furrow range, and concentrated in the furrow and 1.8 m toward ridge direction. The distribution of grape roots for Turpan traditional farming clay loam area was relatively concentrated. The maximum depth of vertical distribution was less than 1 m, and the maximum density presented at 20-40 cm. The horizontal root distribution was less than 2 m but concentrated in the 1.2 m range toward ridge direction. After using drip irrigation, the absorb root increased significant in the ridge and 0-40 cm under surface of furrow. The root density has little change Changes under 60 cm.There existed a linear relationship among leaf length, leaf width, leaf midrib length of mature grape ; there existed a linear relationship among leaf area, leaf length square, leaf length by leaf width ; there existed a good power function relationship among leaf area and leaf length, leaf width, leaf midrib length ; there existed a exponential function relationship among grape branch length, branch length of last third quarter, average number of leaves on branches, average leaves length ; there existed a good linear relationship between grape berry weight and berry size ; there existed a exponential function relationship between grape berry weight and longitudinal diameter ; there existed a power function relationship between ground dry weight of shoot and branch length ; there showed "S"-shaped relationship between ground dry weight of shoot and leaf number. In the grape harvest period, grape sugar content showed linear relationship to berry weight.Changes of leaf area index growth process can be well expressed by Logistic model

Mots clés : Extremely drought region mature grape drip irrigation water consumption model simulation

Présentation (Dissertationtopic)

Page publiée le 3 mai 2013, mise à jour le 4 mai 2018