[Objective] There are continuous rainy days in Western Sichuan Plain in autumn. In order to avoid the impact of wet injury in sowing period, new varieties of Brassica napus L. with low erucidic acid and glucosinolate ...[Objective] There are continuous rainy days in Western Sichuan Plain in autumn. In order to avoid the impact of wet injury in sowing period, new varieties of Brassica napus L. with low erucidic acid and glucosinolate content which are suitable for no-tillage late direct-sowing in Western Sichuan Plain were screened in this study. [Method] Ten major varieties of Brassica napus L. were screened by randomized block design and triplicated plot test with no-tillage late direct-sowing and straw mulching for comparative experiment. [Result] ‘Chuanyou 58＇, ‘Huayouza 10＇and ‘Ningza 11＇ have high yield（per unit area yield above 3 000 kg/hm2）, excellent comprehensive characters, short growth period, high resistance and high quality;‘Huayouza 13＇ and ‘Zheshuang 3＇ have high yield potential（per unit area yield above 2 775 kg/hm2）, high resistance, high quality and moderate growth period; other varieties have extremely significant yield reduction, poor comprehensive characters and low resistance compared with control. [Conclusion] Excellent varieties of Brassica napus L. in the middle and lower reaches of Yangtze River such as ‘Huayouza10＇, ‘Ningza 11＇, ‘Huayouza 13＇ and ‘Zheshuang 3＇ can be successfully introduced and applied for large-area cultivation in Western Sichuan Plain.展开更多
Traditional rural homegarden agroforestry systems(referred to as homegarden) in the Western Sichuan Plain of China are often referred to as "Linpan" in Chinese. These homegardens are usually composed of farm...Traditional rural homegarden agroforestry systems(referred to as homegarden) in the Western Sichuan Plain of China are often referred to as "Linpan" in Chinese. These homegardens are usually composed of farm houses, trees, bamboos, and small patches of land for flowers, fruits and vegetables. Over the Western Sichuan Plain’s area of approximately 18,800 km^2, there were more than 200,000 homegardens, accommodating 72.5% of the region’s rural population. As a unique local, cultural, and ecological resource, homegardens continuously support peasant households with provisioning, regulation, and landscape ecosystem services. This study combined low height remote sensing used unmanned aerial vehicle(UAV) photography, field investigation, and instrument monitoring. We try to identify the composition and structural characteristics of homegardens, as well as climatic regulation effects of the different types of homegardens. Temperature data were collected both for summer(June to August 2016) and winter(December 2016 to February 2017). The result shows that:(1) the average area of homegardens was 0.67 ha(sizes ranging from 0.16 ha to 1.24 ha), and with vegetation coverage 43.5%-76.9%(including 310 plant species).(2)In comparision with outside the homegardens, the average temperature inside the homegardens was significantly lower in summer(approximately 0.31 ℃-0.90 ℃). Although, the lowest summer temperature was differentiatee in between 13:30-16:00. Especially, the thermal effects of the home gardens were ranged from 2.00℃-2.65℃ at high temperatures(≥30℃).(3) The cooling effect of homegardens were positively correlated(p<0.05) with tree area(X_1), vegetation coverage(X_2), tree coverage(X_3), tree species(X_4), and tree biomassper unit area(X_5), and the contribution rate was represented by X_3>X_4>X_5>X_2>X_1.(4)This study indicates the major role of homegardens for climate regulation and energy efficiency, providing suggestions for homegarden transformation and construction planning for new rural communities.展开更多
基金Supported by National 863 Program of China(2011AA10A104)Special Fund for the Construction of Modern Agricultural Technology System(CARS-13)+4 种基金National Scienceand Technology Support Program of China(2010BAD01B08,2011BAD35B04)Breeding Research Project of Sichuan Province(2011NZ0098-5)Financial Genetic Engineering Program of Sichuan Province(2011JYGC04013)Special Fund for Agriculture Innovation Team Building of Sichuan ProvinceOutstanding Youth Academic and Technical Leader Training Program of Sichuan Province(2010JQ0054)~~
文摘[Objective] There are continuous rainy days in Western Sichuan Plain in autumn. In order to avoid the impact of wet injury in sowing period, new varieties of Brassica napus L. with low erucidic acid and glucosinolate content which are suitable for no-tillage late direct-sowing in Western Sichuan Plain were screened in this study. [Method] Ten major varieties of Brassica napus L. were screened by randomized block design and triplicated plot test with no-tillage late direct-sowing and straw mulching for comparative experiment. [Result] ‘Chuanyou 58＇, ‘Huayouza 10＇and ‘Ningza 11＇ have high yield（per unit area yield above 3 000 kg/hm2）, excellent comprehensive characters, short growth period, high resistance and high quality;‘Huayouza 13＇ and ‘Zheshuang 3＇ have high yield potential（per unit area yield above 2 775 kg/hm2）, high resistance, high quality and moderate growth period; other varieties have extremely significant yield reduction, poor comprehensive characters and low resistance compared with control. [Conclusion] Excellent varieties of Brassica napus L. in the middle and lower reaches of Yangtze River such as ‘Huayouza10＇, ‘Ningza 11＇, ‘Huayouza 13＇ and ‘Zheshuang 3＇ can be successfully introduced and applied for large-area cultivation in Western Sichuan Plain.
基金supported by the national Natural Science Foundation of China (No.41401664)the "135" Strategic Program of the Institute of Mountain Hazards and Environment,CAS (No. SDS-135-1703)
文摘Traditional rural homegarden agroforestry systems(referred to as homegarden) in the Western Sichuan Plain of China are often referred to as "Linpan" in Chinese. These homegardens are usually composed of farm houses, trees, bamboos, and small patches of land for flowers, fruits and vegetables. Over the Western Sichuan Plain’s area of approximately 18,800 km^2, there were more than 200,000 homegardens, accommodating 72.5% of the region’s rural population. As a unique local, cultural, and ecological resource, homegardens continuously support peasant households with provisioning, regulation, and landscape ecosystem services. This study combined low height remote sensing used unmanned aerial vehicle(UAV) photography, field investigation, and instrument monitoring. We try to identify the composition and structural characteristics of homegardens, as well as climatic regulation effects of the different types of homegardens. Temperature data were collected both for summer(June to August 2016) and winter(December 2016 to February 2017). The result shows that:(1) the average area of homegardens was 0.67 ha(sizes ranging from 0.16 ha to 1.24 ha), and with vegetation coverage 43.5%-76.9%(including 310 plant species).(2)In comparision with outside the homegardens, the average temperature inside the homegardens was significantly lower in summer(approximately 0.31 ℃-0.90 ℃). Although, the lowest summer temperature was differentiatee in between 13:30-16:00. Especially, the thermal effects of the home gardens were ranged from 2.00℃-2.65℃ at high temperatures(≥30℃).(3) The cooling effect of homegardens were positively correlated(p<0.05) with tree area(X_1), vegetation coverage(X_2), tree coverage(X_3), tree species(X_4), and tree biomassper unit area(X_5), and the contribution rate was represented by X_3>X_4>X_5>X_2>X_1.(4)This study indicates the major role of homegardens for climate regulation and energy efficiency, providing suggestions for homegarden transformation and construction planning for new rural communities.
