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2楼2013-08-12 10:47:00
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3楼2013-08-12 11:03:48
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andrewzhang

铁杆木虫 (著名写手)

超级无敌加菲

【答案】应助回帖

★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★
感谢参与,应助指数 +1
hanches: 金币+2, 热心应助有奖~~~ 2013-08-13 09:08:05
wxksx521521: 金币+21, ★★★★★最佳答案 2013-08-13 10:27:53
wxksx521521(hanches代发): 金币+9 2013-10-06 22:24:08
On one hand, the CO2 concentration of the mulch covered soil could be much greater than that of non-mulched, this fact would impede the soil aeration, which is a critical factor for potato growth.
On the other hand, plastic mulch could increase the temperature of the soil, and that would easily exceed the optimum value during certain periods, which would have restrained the root growth, and thereby caused the yield losses.
4楼2013-08-12 16:37:19
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myIDname

木虫 (著名写手)

人民大会堂首席清洁工

你想表达的汉语意思也贴出来。
我们这里有勇敢的人民/荜路蓝缕以启山林/我们这里有无穷的生命/水牛稻米香蕉玉兰花
5楼2013-08-12 21:47:58
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