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

Accueil du site → Master → Chine → 2020 → Study on the Yield, Quality and Water Use of Artificial Grassland by Different Irrigation Modes in Inland Arid Grassland

Gansu Agricultural University (2020)

Study on the Yield, Quality and Water Use of Artificial Grassland by Different Irrigation Modes in Inland Arid Grassland

康文彦;

Titre : Study on the Yield, Quality and Water Use of Artificial Grassland by Different Irrigation Modes in Inland Arid Grassland

Auteur : 康文彦;

Grade : Master’s Theses 2020

Université : Gansu Agricultural University

Résumé
The shortage of water resources in the inland arid grassland area,the low yield of natural grassland pastures and the increasing degradation of grassland vegetation communities have severely restricted the cyclic development of the local animal husbandry and ecological environment.An important way to ensure the sustainable and healthy development of the soil environment.This study was carried out in Huajian Township Experimental Base,Suzhou District,Jiuquan City,with a typical arid climate from 2018 to 2019.The experiment adopts a complete block design,setting 7 irrigation modes and 2 planting methods.The experiment has a total of 14treatments,and each treatment has 3 repeats.By exploring the effects of different irrigation patterns and planting methods on dry matter yield,quality and water use of artificial grasslands,the aim is to obtain a management model suitable for high-yield,high-quality and water-saving grasslands in the inland arid grasslands of northwestern China.The following conclusions are obtained :(1)Under different irrigation modes,the grassland soil water content increases with the increase of the irrigation water limit.In the two growing seasons,the average water content of the CK treatment is higher than that of other irrigation treatments,the A4 treatment has the lowest irrigation water content,and the lowest soil water content.During the planting period and the greening period,there was no obvious regularity of soil moisture between different treatments,but they all showed a higher depth of soil moisture.The soil moisture content of treatments at jointing stage differed significantly in each treatment.The soil water content in the treatment with high irrigation limit was significantly higher than that in the treatment with low irrigation limit,and the soil water content in the heading stage A1,A2 and A3treatment was significantly higher than that in the jointing stage.Under the same treatment,the water content gradually increased with the depth of the soil layer.Affected by irrigation and rainfall,the soil water content of the 0-60 cm soil layer fluctuated greatly in each treatment,while the change of the deep soil water content was small.As the growth period of pastures advances,the moisture content of the deep soil of each treatment gradually decreases.Compared with alfalfa,the awnless brome has a shallower root system,so the mixed soil is more obvious than the monoculture grassland.The soil moisture content decreases with the growth period.(2)In the 2019 growing season,under the same irrigation pattern,the dry matter yield of forage grass gradually decreases with the number of stubble cuts.

Mots clés : Inland arid area; Sprinkling irrigation; Artificial grassland; Forage yield; Forage quality; Water use efficiency;

Présentation (CNKI)

Page publiée le 16 octobre 2020