论文部分内容阅读
试验采用4因子3水平正交设计,对紫花苜蓿,青贮玉米,籽粒苋和饲料苦买菜进行了在不同播种量、灌水时期、施肥种类、刈割方式下的栽培试验。结果表明,紫花苜蓿在播种量A_1 1.2 kg/667 m~2,初次刈割后灌水,施用农家肥22 500 kg/hm~2和每年刈割3茬,其产草量最高,达7136kg/hm~2;庆单3号青贮玉米,种植密度5000株/667m~2基肥施用农家肥22 500 kg/hm~2和追施两次氮肥尿素总量60 kg/667 m~2时,青贮玉米产量最高,达78.96 t/hm~2;籽粒苋在种植密度4 000株/667 m~2,基肥施用磷酸二铵150 kg/hm~2和追施两次氮肥尿素总量60 kg/667m~2,植株长至60 cm高灌水时,产量最高,达75.48 t/hm~2;饲料苦荬菜在播种量0.5 kg/667m~2,基肥施用农家肥22 500 kg/hm~2,植株长至30 cm高时灌水,年刈割3茬,产量最高,达51.28 t/hm~2。分别比传统种植模式提高33.3%、16.2%、14.4%和12.3%。
In the experiment, orthogonal design of four factors and three levels was used to test the cultivation of alfalfa, silage corn, amaranth and bitter gourd under different sowing times, irrigation periods, fertilizer types and mowing methods. The results showed that the highest yield of alfalfa was obtained when the seeding rate was A_1 1.2 kg / 667 m ~ 2, the first irrigation after cutting, the application of 22 500 kg / hm ~ 2 of farm manure and the three cutting per year, the highest yield was 7136 kg / hm ~ 2; Silage corn of No. 3, planting density of 5000 plants / 667m ~ 2 basal fertilizer application of 22 500 kg / hm ~ 2 manure and topdressing two nitrogenous fertilizer total urea of 60 kg / 667 m ~ 2, The highest grain yield was 78.96 t / hm ~ 2. The grain amaranth was planted at a density of 4 000 plants / 667 m ~ 2, 150 kg / hm2 of basal fertilizer and 60 kg / 667 m ~ , And the highest yield was 75.48 t / hm ~ 2 when the plant was 60 cm high irrigated. The feed was applied at the rate of 0.5 kg / 667 m ~ 2 for seeding, 22 500 kg / hm ~ 2 for basal application, Irrigated at 30 cm high, the crop mowed three times a year, the highest yield, reaching 51.28 t / hm ~ 2. Respectively 33.3%, 16.2%, 14.4% and 12.3% higher than the traditional planting modes.