By investigation on the damage of longhorned beetles on poplar,it was found that the damage rate decreased with the increase of plant to pest origin.For the trees planted in the current year, 84.9% of notch was distri...By investigation on the damage of longhorned beetles on poplar,it was found that the damage rate decreased with the increase of plant to pest origin.For the trees planted in the current year, 84.9% of notch was distributed in the area 1 meter above the ground,while for 2-year-old trees,the notchs were distributed mainly in the area 2 meters above the ground,which took 75.8% of the total.Two pesticides (Fenitrothion and Luseweilei) were used to control the insect and the results showed that both pesticides could control the insect effectively.When Luseweilei was used,but the notch rate and number seemed to be higher compared with that when Fenitrothion was used,but the former could make higher insect mortality rate than latter.展开更多
Taking 3 kinds of N,P,K compound fertilizers and P fertilizer as basal manure,the experiment was conducted in 3 levels.The results showed that in same level,various fertilizers had no evident different effects.The amo...Taking 3 kinds of N,P,K compound fertilizers and P fertilizer as basal manure,the experiment was conducted in 3 levels.The results showed that in same level,various fertilizers had no evident different effects.The amount of fertilization could significantly affect the height increment of trees but did not significantly affect the diameter increment.By increase the application of organic fertilizer accompanied with chemical fertilizer,great difference was found in height increment and diameter increment among different treatments.The treatment 6 was the best in promoting branch growth and DBH increase of poplar.展开更多
Four crop species were intercropped in fast-growing and high-yielding poplar plantation.After intercropping with different crops,the increments of poplar increased to different extent.Intercropping with watermelon had...Four crop species were intercropped in fast-growing and high-yielding poplar plantation.After intercropping with different crops,the increments of poplar increased to different extent.Intercropping with watermelon had the best effects.The height,DBH and amount of new breach increased by 21.6%,44.8% and 100% respectively.The annual net income could be as high as 7 800 yuan·hm^2.展开更多
The results of water-saving irrigation trial on sandy land showed that the change of irrigation pattern could save water greatly.Among furrow irrigation,patch irrigation and flooding irrigation,furrow irrigation could...The results of water-saving irrigation trial on sandy land showed that the change of irrigation pattern could save water greatly.Among furrow irrigation,patch irrigation and flooding irrigation,furrow irrigation could save water by 444～750 m3·hm-2·a-1 and 3 270～4 275 m3·hm-2·a-1 respectively compared with patch irrigation and flooding irrigation.Under the three irrigation patterns,no evident difference was found for the increment of poplar.展开更多
文摘By investigation on the damage of longhorned beetles on poplar,it was found that the damage rate decreased with the increase of plant to pest origin.For the trees planted in the current year, 84.9% of notch was distributed in the area 1 meter above the ground,while for 2-year-old trees,the notchs were distributed mainly in the area 2 meters above the ground,which took 75.8% of the total.Two pesticides (Fenitrothion and Luseweilei) were used to control the insect and the results showed that both pesticides could control the insect effectively.When Luseweilei was used,but the notch rate and number seemed to be higher compared with that when Fenitrothion was used,but the former could make higher insect mortality rate than latter.
文摘Taking 3 kinds of N,P,K compound fertilizers and P fertilizer as basal manure,the experiment was conducted in 3 levels.The results showed that in same level,various fertilizers had no evident different effects.The amount of fertilization could significantly affect the height increment of trees but did not significantly affect the diameter increment.By increase the application of organic fertilizer accompanied with chemical fertilizer,great difference was found in height increment and diameter increment among different treatments.The treatment 6 was the best in promoting branch growth and DBH increase of poplar.
文摘Four crop species were intercropped in fast-growing and high-yielding poplar plantation.After intercropping with different crops,the increments of poplar increased to different extent.Intercropping with watermelon had the best effects.The height,DBH and amount of new breach increased by 21.6%,44.8% and 100% respectively.The annual net income could be as high as 7 800 yuan·hm^2.
文摘The results of water-saving irrigation trial on sandy land showed that the change of irrigation pattern could save water greatly.Among furrow irrigation,patch irrigation and flooding irrigation,furrow irrigation could save water by 444～750 m3·hm-2·a-1 and 3 270～4 275 m3·hm-2·a-1 respectively compared with patch irrigation and flooding irrigation.Under the three irrigation patterns,no evident difference was found for the increment of poplar.
