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通过传统耕作、生物炭翻耕覆盖、地膜免耕覆盖、地膜翻耕覆盖、留茬覆盖和条带覆盖处理方式,分析不同耕作和覆盖方式对玉米长势及光合特性的影响。结果表明,地膜覆盖可通过提高地温明显缩短玉米出苗期,地膜翻耕和生物炭处理对玉米的生长均起到促进作用,影响期分别为苗期和拔节期。对比传统耕作,秸秆整秆覆盖和地膜覆盖在免耕条件下不利于植株生长。拔节期不同处理玉米净光合速率与气孔导度、蒸腾速率均呈正相关,生物炭处理净光合速率最高。
The effects of different tillage and mulching methods on the growth and photosynthetic characteristics of maize were analyzed through traditional tillage, biochar plowing and tillage with no-till film mulch, mulch tillage mulch, stubble mulching and strip covering. The results showed that plastic film mulching could significantly reduce corn seedling stage by increasing the ground temperature, plastic film mulching and biochar treatment promoted the growth of maize, and the influence period was seedling stage and jointing stage respectively. Compared with traditional tillage, straw mulching and plastic film mulching are not conducive to plant growth under no-tillage conditions. The net photosynthetic rate of maize at jointing stage was positively correlated with stomatal conductance and transpiration rate, and the net photosynthetic rate of biochar was the highest.