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

Accueil du site → Master → Chine → 2003 → Effect of Conventiona and No-tillage on Soil Water Use Efficiency under Different Mulching Method in Dryland Area

Gansu Agricultural University (2003)

Effect of Conventiona and No-tillage on Soil Water Use Efficiency under Different Mulching Method in Dryland Area

Zhang Gui Feng

Titre : Effect of Conventiona and No-tillage on Soil Water Use Efficiency under Different Mulching Method in Dryland Area

Auteur : Zhang Gui Feng

Grade : Master’s Theses 2003

University : Gansu Agricultural University

Résumé
Spring wheat growth in the typical semi-arid regions - Dingxi County, Lee Ka advancement of conservation tillage trials, six kinds of processing different growth stages of soil water content changes in different growth stages of soil water storage, soil moisture in time and space change on wheat in different growth stages of water consumption, water consumption, soil water utilization efficiency study, the results showed that : 1, the upper limit of the available soil water DUL, the lower limit is CLL, the intermediate region is PAWC. CLL is to overcome the drawbacks of the PWP, the curve is an increase from top to bottom increased with soil depth, area under the curve for crops is invalid water, crops can not be use. This is more objective, more accurate reflection of the absorbent capacity and condition of a crop in a particular soil. 2, total water storage in the leisure of T and NT treatment than any kind of coverage are high, conventional tillage cover showed good water supply throughout the growing period of the wheat TS, TP treatment showed good water retention ; no-tillage type of coverage, NTS Processing exhibit good water resistance, and NTP showed good water retention. 3. The leisure of conventional tillage different cover soil moisture changes in the surface layer (0-30cm) highest moisture content is TS, TP lower ; T at the following levels are highest. No-till cover changes in soil moisture, surface and middle-level (0 to 110cm) have the highest NTS deep is the highest in the NT. Coverage than not covered by water retention in the wheat growing period, no-tillage better than conventional tillage, NTS wheat water demand larger water supply performance during the best and NTP showed good water retention

Mots clés : Conventional tillage No-tillage Different coverage Rainfed wheat field Soil moisture The use of impact

Présentation (Dissertation topics)

Page publiée le 5 octobre 2014, mise à jour le 21 septembre 2017