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小南瓜是北方半干旱区增加经济产值的适生作物之一。该试验以日本“赤甘栗”小南瓜品种为试材,在3种密度(1 666、2 500、5 000株·hm~(-2))、2个灌溉量(3~4、6~8mm·d~(-1))和4个牛粪氮添加水平(N 25、50、75、100kg·hm~(-2))处理下进行大田试验,研究不同水、氮供应及种植密度对小南瓜产量的影响。结果表明:在中密度和高密度栽培下,小南瓜产量会随着氮添加量的增加而增加,但未受灌溉量的影响,但水分生产率会随着灌溉量增加而降低;在低密度栽培下灌溉量和氮添加量的增加都会导致小南瓜产量的增加,且水分生产率随着氮的提高会相应提高但未受灌溉量的影响;内蒙古半干旱地区春末夏季气候有利于小南瓜的种植,在定植密度为1 667株·hm~(-2)时,随氮肥的提高小南瓜产量及水分生产率均可增加,在3~4、6~8mm·d~(-1)灌溉水平下小南瓜产量分别为6.99、15.34t·hm~(-2)。
Small pumpkin is one of the suitable crops for increasing economic output in the northern semi-arid area. In this experiment, we used the small pumpkin variety “Chigamura” in Japan as test material, and tested the effects of three irrigation treatments (3,6,6, 2,200 and 5,000 plants · hm -2) ~ 8mm · d ~ (-1)) and four manure nitrogen addition levels (N 25, 50, 75, 100 kg · hm -2). The effects of different water and nitrogen supply and planting density The impact of small pumpkin production. The results showed that under moderate and high density cultivation, the output of small pumpkin increased with the increase of nitrogen addition, but it was not affected by the amount of irrigation, but the water productivity decreased with the increase of irrigation. In low-density cultivation Under the condition of lower irrigation and nitrogen addition, the output of small squash increased, and the water productivity increased correspondingly with the increase of nitrogen but not influenced by the amount of irrigation. The climate in late spring and late summer in Inner Mongolia benefited the cultivation of squash When the planting density was 1 667 plants · hm -2, the output and water productivity of small pumpkin increased with the increase of nitrogen fertilizer, and the irrigation rate of 3 ~ 4,6 ~ 8mm · d -1 was small Pumpkin yield was 6.99 and 15.34 t · hm -2, respectively.